H. Jung, Z. Liu, M. Sotome, and T. Kondo, "Vapor phase deposition of lead-free halide perovskite alloy CsSn1-xZnxBr3." Japanese Journal of Applied Physics, 63, 01SP24 (2024). DOI: 10.35848/1347-4065/acfdb3
Z. Liu, H. Jung, M. Sotome, and T. Kondo, "Substrate temperature dependence of vapor phase deposition of all-inorganic lead-free CsSnBr3 perovskite thin films." Japanese Journal of Applied Physics, 63, 01SP23 (2024). DOI: 10.35848/1347-4065/ad1196
T. Noma, H. Y. Chen, B. Dhara, M. Sotome, T. Nomoto, R. Arita, M. Nakamura, D. Miyajima, "Bulk Photovoltaic Effect Along the Nonpolar Axis in Organic–Inorganic Hybrid Perovskites." Angewandte Chemie, e202309055 (2023). DOI: 10.1002/anie.202309055
Hui Chen, Yongsheng Ren, Masato Sotome, Takashi Kondo, and Kazuki Morita, "Solid solubility and site preference of Ti in 3C-and 6H-SiC". Materialia, 21, 101369 (2022). DOI: 10.1016/j.mtla.2022.101369.
Yuiga Nakamura, Tomonori Matsushita, and Takashi Kondo, “Ternary-source vapor-phase deposition of CH3NH3PbI3 polycrystalline thin films using CH3NH2 and HI gas sources with PbI2 solid source,” Japanese Journal of Applied Physics 60.1, 015505 (2021). DOI: 10.35848/1347-4065/abd0c6.
Tae Woong Kim and Takashi Kondo, “Direction-selective electron beam damage to CH3NH3PbI3 based on crystallographic anisotropy,” Appl. Phys. Express 13, 091001-1–4 (2020). DOI: 10.35848/1882-0786/ababee.
Masaki Nishio, Masaki Shimada, Kenichiro Omoto, Toyotaka Nakae, Hiroaki Maeda, Mariko Miyachi, Yoshinori Yamanoi, Eiji Nishibori, Naofumi Nakayama, Hitoshi Goto, Tomonori Matsushita, Takashi Kondo, Mineyuki Hattori, Keiko Jimura, Shigenobu Hayashi, and Hiroshi Nishihara, “Selective formation and SHG intensity of non-centrosymmetric and centrosymmetric 1,1,2,2-tetramethyl-1-(4-(N,N-dimethylamino)phenyl)-2-(2-cyanophenyl)disilane crystals under external stimuli,” J. Phys. Chem. C. 124, 17450–17458 (2020). DOI: 10.1021/acs.jpcc.0c03139.
Y. Nakamura, N. Shibayama, A. Hori, T. Matsushita, H. Segawa, and T. Kondo, “Crystal systems and lattice parameters of CH3NH3Pb(I1-xBrx)3 determined using single crystals: Validity of Vegard’s law,” Inorg. Chem. 59, 6709–6716 (2020). DOI: 10.1021/acs.inorgchem.9b03421.
Tae Woong Kim, Satoshi Uchida, Takashi Kondo, and Hiroshi Segawa, “Optimization of TiO2 compact layer formed by atomic layer deposition for efficient perovskite solar cells,” Appl. Phys. Lett. 115, 203902-1–4 (2019). DOI: 10.1063/1.5120307.
Tae Woong Kim, Satoshi Uchida, Takashi Kondo, and Hiroshi Segawa, “Microstructural investigation of a compact TiO2 layer for improvement of perovskite solar cells,” Appl. Phys. Lett. 115, 053902-1–4 (2019). DOI: 10.1063/1.5109699.
Kohei Kimura, Yuiga Nakamura, Tomonori Matsushita, and Takashi Kondo, “Epitaxial CH3NH3Pb(Br1-xIx)3 thin films on CH3NH3PbBr3 single crystal substrates formed by physical vapor deposition,” Jpn. J. Appl. Phys. 58, SBBF04-1–4 (2019). DOI: 10.7567/1347-4065/aafed0.
Shumin Wang, Tomonori Matsushita, Takashi Matsumoto, Shigeki Yoshida, and Takashi Kondo, “Quasi-phase matched difference frequency generation in corrugation-reduced GaAs/AlGaAs periodically-inverted waveguides,” Jpn. J. Appl. Phys. 58, SBBE01-1–4 (2019). DOI: 10.7567/13474065/aaf87c.
T. W. Kim, T. Matsushita, S. Uchida, T. Kondo, and H. Segawa, “Quantitative fraction analysis of coexisting phases in a polycrystalline CH3NH3PbI3 perovskite,” Appl. Phys. Express 11, 101401-1–4 (2018). DOI: 10.7567/APEX.11.101401.
T. W. Kim, N. Shibayama, L. Cojocaru, S. Uchida, T. Kondo, and H. Segawa, “Real-time in situ observation of microstructural change in organometal halide perovskite induced by thermal degradation,” Adv. Funct. Mater. 28, 1804039-1–8 (2018). DOI: 10.1002/adfm.201804039.
T. W. Kim, K. Amazutsumi, T. Matsushita and T. Kondo, “Transmission electron microscopy observation of crystal twinning in periodically inverted AlGaAs grown by low-temperature molecular beam epitaxy,” Jpn. J. Appl. Phys. 57, 100306-1–4 (2018). DOI: 10.7567/JJAP.57.100306.
A. Sugita, K. Ito, Y. Sato, R. Suzuki, K. Sato, T. Narumi, N. Mase, Y. Takano, T. Matsushita, S. Tasaka, and Y. Kawata, “The Role of Chemisorption for Push-Pull Chromophores on SiO2 Surfaces in Non-Electrically Poling Host-Guest NLO Polymers,” J. Photochem. and Photobiology A: Chemistry 340, (2017) 35–45.
T. Matsushita, Y. Nakamura, and T. Kondo, “Design of zigzag folded inversion-stacked AlGaAs waveguides for ultra-compact wavelength converters,” Opt. Express 25, 22829–22839 (2017). DOI: 10.1364/OE.25.022829.
H. Kunugita, Y. Kiyota, Y. Udagawa, Y. Takeoka, Y. Nakamura, J. Sano, T. Matsushita, T. Kondo, and K. Ema, “Exciton-exciton scattering in perovskite CH3NH3PbBr3 single crystal,” Jpn. J. Appl. Phys. 55, 060304- 1–3 (2016). DOI: 10.7567/JJAP.55.060304.
T.W. Kim, K.Hanashima, T. Matsushita, and T. Kondo, “Antiphase structures in a periodically-inverted GaAs/AlGaAs waveguide investigated by transmission electron microscope,” Jpn. J. Appl. Phys. 55, 015502-1–5 (2016). DOI: 10.7567/JJAP.55.015502.
H. Kunugita, T. Hashimoto, Y. Kiyota, Y. Udagawa, Y. Takeoka, Y. Nakamura, J. Sano, T. Matsushita, T. Kondo, T. Miyasaka, and K. Ema, “Excitonic feature in hybrid perovskite CH3NH3PbBr3 single crystals,” Chem. Lett. 44, 852–854 (2015). DOI: 10.1246/cl.150204.
R. Narasaki, T. Matsushita, and T. Kondo, “Corrugation reduction in periodically inverted GaAs by molecular beam epitaxy growth using arsenic dimers,” Appl. Phys. Express 8, 025601-1–4 (2015). DOI: 10.7567/APEX.8.025601.
M. Shimada, Y. Yamanoi, T. Matsushita, T. Kondo, E. Nishi-bori, A. Hatakeyama, K. Sugimoto, and H. Nishihara, “Optical properties of disilane-bridged donoracceptor architectures: Strong effect of substituents on fluorescence and non-linear optical properties,” J. Am. Chem. Soc. 137, 1024–1027 (2015). DOI: 10.1021/ja511177e.
M. Abe, N. Awata, T. Matsushita, M. Hakamata, K. Ozawa, R. Murakami, I. Shoji, and T. Kondo, “Accurate measurement of quadratic nonlinear-optical coefficients of zinc oxide,” J. Opt. Soc. Am. B 29, 2302–2306 (2012). DOI: 10.1364/JOSAB.29.002392.
T. W. Kim, T. Matsushita, and T. Kondo, “Phase-matched second-harmonic generation in thin rectangular high-index-contrast AlGaAs waveguides,” Appl. Phys. Express 4, 082201-1–3 (2011). DOI: 10.1143/APEX.4.082201.
M. Abe, H. Sato, I. Shoji, J. Suda, M. Yoshimura, Y. Kitaoka, Y. Mori, and T. Kondo, “Accurate measurement of quadratic nonlinear-optical coefficients of gallium nitride,” J. Opt. Soc. Am. B 27, 2026–2034 (2010). DOI: 10.1364/JOSAB.27.002026.
H. Sato, M. Abe, I. Shoji, J. Suda, and T. Kondo: “Accurate measurements of second-order nonlinear optical coefficients of 6H and 4H silicon carbide,” J. Opt. Soc. Am. B 26, 1892–1896 (2009). DOI: 10.1364/JOSAB.26.001892.
T. Matsushita, I. Ohta, and T. Kondo: “Quasi-Phase-Matched Parametric Fluorescence in a Periodically Inverted GaP Waveguide,” Appl. Phys. Express 2, 061101-1–3 (2009). DOI: 10.1143/APEX.2.061101.
J. Ota, W. Narita, I. Ohta, T. Matsushita, and T. Kondo: “Fabrication of Periodically-Inverted AlGaAs Waveguides for Quasi-Phase-Matched Wavelength Conversion at 1.55 µm,” Jpn. J. Appl. Phys. 48, 04C110-1–4 (2009). DOI: 10.1143/JJAP.48.04C110.
H. Ishikawa and T. Kondo, “Birefringent phase matching in thin rectangular high-index-contrast waveguides,” Appl. Phys. Express 2, 042202-1–3 (2009). DOI: 10.1143/APEX.2.042202.
H. Sato, I. Shoji, J. Suda, and T. Kondo: “Accurate measurements of second-order nonlinear-optical coefficients of silicon carbide,” Materials Science Forum 615-617, 315–318 (2009).
M. Abe, I. Shoji, J. Suda, and T. Kondo: “Comprehensive analysis of multiple-reflection effects on rotational Maker-fringe experiments,” J. Opt. Soc. Am. B 25, 1616–1624 (2008). DOI: 10.1364/JOSAB.25.001616.
R. Katayama, K. Onabe, H. Yaguchi, T. Matsushita and T. Kondo: “Modulation spectroscopic investigation on lattice polarity of gallium nitrides,” Appl. Phys. Lett. 91, 061917-1–3 (2007). DOI: 10.1063/1.2764115.
R. Katayama, Y. Kuge, T. Kondo and K. Onabe: “Fabrication of Lateral Lattice-Polarity-Inverted GaN Heterostructure,” J. Cryst. Growth 301–302, 447–451 (2007). DOI: 10.1016/j.jcrysgro.2006.11.182.
T. Matsushita, T. Yamamoto, and T. Kondo: “Epitaxial Growth of Spatially Inverted GaP for Quasi Phase Matched Nonlinear Optical Devices,” Jpn. J. Appl. Phys. 46, L408–410 (2007). DOI: 10.1143/JJAP.46.L408.
R. Katayama, Y. Kuge, K. Onabe, T. Matsushita and T. Kondo: “Complementary Analyses on the Local Polarity in Lateral Polarity-Inverted GaN Heterostructure on Sapphire (0001) Substrate,” Appl. Phys. Lett. 89, 231910-1–3 (2006). DOI: 10.1063/1.2398924.
T. Yamamura, T. Matsushita, T. Koitabashi and T. Kondo: “Influence of Anisotropic Diffusion of Ga Atoms on GaAs Growth on Alternately Inverted (100) Substrates,” Jpn. J. Appl. Phys. 44, L1397–1399 (2005). DOI: 10.1143/jjap.44.L1397.
K. Tanaka, T. Kondo, T. Umebayashi, K. Asai, K. Uchida, N. Miura, and K. Ema: “Electronic and Excitonic Structures of an Inorganic-Organic Perovskite-Type Quantum-Well Crystal (C4H9NH3)2PbBr4,” Jpn. J. Appl. Phys. 44, 5923–5392 (2005). DOI: 10.1143/JJAP.44.5923.
K. Tanaka, T. Takahashi, T. Kondo, T. Umebayashi, K. Asai, and K. Ema: “Image Charge Effect on Two-Dimensional Excitons in an Inorganic-Organic Quantum-Well Crystal,” Phys. Rev. B 71, 045312-1–6 (2005). DOI: 10.1103/PhysRevB.71.045312.
K. Tanaka, R. Ozawa, T. Umebayashi, K. Asai, K. Ema, and T. Kondo: “One-Dimensional Excitons in Inorganic-Organic Self-Organized Quantum-Wire Crystals [NH2C(I)=NH2]3PbI5 and [CH3SC(=NH2)NH2]3PbI5,” Physica E 25, 378–383 (2005). DOI: 10.1016/j.physe.2004.06.056.
K. Tanaka and T. Kondo: “Bandgap and Exciton Binding Energies in Lead-Iodide-Based Natural Quantum-Well Crystals,” Sci. Tech. Adv. Mater. 4, 599–604 (2003). DOI: 10.1016/j.stam.2003.09.019.
Y. Kato, D. Ichii, K. Ohashi, H. Kunugita, K. Ema, K. Tanaka, T. Takahashi, and T. Kondo: “Extremely Large Binding Energy of Biexcitons in an Organic-Inorganic Quantum-Well Material (C4H9NH3)2PbBr4,” Solid State Commun. 128, 15–18 (2003). DOI: 10.1016/S0038-1098(03)006264.
K. Tanaka, T. Takahashi, T. Ban, T. Kondo, K. Uchida, and N. Miura: “Comparative Study on the Excitons in Lead-Halide-Based Perovskite-Type Crystals CH3NH3PbBr3 and CH3NH3PbI3,” Solid State Commun. 127, 619–623 (2003). DOI: 10.1016/S0038-1098(03)00566-0.
S. Kusano, S. Nakatani, T. Takahashi, K. Hirano, S. Koh, M. Ebihara, T. Kondo, and R. Ito: “Study on Sublattice Reversal in a GaAs/Ge/GaAs(001) Crystal by X-ray Standing Waves,” Jpn. J. Appl. Phys. 42, 2582–2586 (2003). DOI: 10.1143/jjap.42.2582.
T. Umebayashi, K. Asai, T. Kondo, and A. Nakao: “Electronic Structures of Lead Iodide Based Low-Dimensional Crystals,” Phys. Rev. B 67, 155405-1–6 (2003). DOI: 10.1103/PhysRevB.67.155405.
I. Shoji, T. Kondo, and R. Ito: “Second-Order Susceptibilities of Various Dielectric and Semiconductor Materials,” Opt. Quantum Electron. 36, 797–833 (2002). DOI: 10.1023/A:1016545417478.
K. Tanaka, F. Sano, T. Takahashi, T. Kondo, R. Ito, and K. Ema: “Two-Dimensional Wannier Excitons in a Layered-Perovskite-Type Crystal (C6H13NH3)2PbI4,” Solid State Commun. 122, 249–252 (2002). DOI: 10.1016/S0038-1098(02)00126-6.
N. Usami, Y. Azuma, T. Ujihara, G. Sazaki, K. Nakajima, Y. Yakabe, T. Kondo, K. Kawaguchi, S. Koh, Y. Shiraki, B. P. Zhang, Y. Segawa, and S. Kodama: “Molecular Beam Epitaxy of GaAs on Nearly Lattice-Matched SiGe Substrates Grown by the Multicomponent Zone-Melting Method,” Semicond. Sci. Technol. 16, 699–703 (2001). DOI: 10.1088/0268-1242/16/8/311.
K. Ema, J. Ishi, H. Kunugita, T. Ban, and T. Kondo: “All-Optical Serial-to-Parallel Conversion of T-bits/s Signals using a Four-Wave-Mixing Process,” Opt. Quantum Electron. 33, 1077–1087 (2001). DOI: 10.1023/A:1017560609085.
J. Ishi, H. Kunugita, K. Ema, T. Ban, and T. Kondo: “Influence of Exciton-Exciton Interactions on Frequency-Mixing Signals in a Stable Exciton-Biexciton System,” Phys. Rev. B 63, 073303-1–4 (2001). DOI: 10.1103/PhysRevB.63.073303.
S. Koh, T. Kondo, Y. Shiraki, and R. Ito, “GaAs/Ge/GaAs Sublattice Reversal Epitaxy and its Application to Nonlinear Optical Devices,” J. Cryst. Growth 227–228, 183–192 (2001). DOI: 10.1016/S0022-0248(01)006601.
I. Shoji, H. Nakamura, R. Ito, T. Kondo, M. Yoshimura, Y. Mori, and T. Sasaki: “Absolute Measurement of Second-Order Nonlinear-Optical Coefficients of CsLiB6O10 for Visible to Ultraviolet Second-Harmonic Wavelengths,” J. Opt. Soc. Am. B 18, 302–307 (2001). DOI: 10.1364/JOSAB.18.000302.
N. Usami, Y. Azuma, T. Ujihara, G. Sazaki, K. Nakajima, Y. Yakabe, T. Kondo, S. Koh, Y. Shiraki, B. Zhang, Y. Segawa, and S. Kodama: “SiGe Bulk Crystal as a Lattice-Matched Substrate to GaAs for Solar Cell Applications,” Appl. Phys. Lett. 77, 3565–3567 (2000). DOI: 10.1063/1.1329639.
T. Kondo, S. Koh, and R. Ito: “Sublatice Reversal Epitaxy: A Novel Technique for Fabricating Domain Inverted Compound Semiconductor Structures,” Sci. Tech. Advanced Materials 1, 173–179 (2000). DOI: 10.1016/S1468-6996(00)00020-6.
J. Ishi, H. Kunugita, K. Ema, T. Ban, and T. Kondo: “Time-to-Space Conversion of Tbits/s Optical Pulses Using a Self-Organized Quantum-Well Material,” Appl. Phys. Lett. 77, 3487–3489 (2000). DOI: 10.1063/1.1328365.
S. Nakatani, S. Kusano, T. Takahashi, K. Hirano, S. Koh, T. Kondo, and R. Ito: “Study of Sublattice Inversion in GaAs/Ge/GaAs(001) Crystal by X-ray Diffraction,” Appl. Surf. Sci. 159–160, 256–259 (2000). DOI: 10.1016/S0169-4332(00)00098-2.
S. Koh, T. Kondo, T. Ishiwada, H. Sawada, H. Ichinose, I. Shoji, and R. Ito: “Characterization of Sublattice-Reversed GaAs by Reflection High Energy Diffraction and Transmission Electron Microscopy,” Physica E 7 (3-4) 876–880 (2000). DOI: 10.1016/S1386-9477(00)00080-1.
E. Nishina, R. Katayama, T. Kondo, R. Ito, J.-C. Kim, T. Watanabe, and S. Miyata: “Design and Fabrication of Organic Waveguiding Devices for Quasi-Phase-Matched Second-Harmonic Generation,” Nonlinear Opt. 22, 433–436 (1999).
J. Ishi, H. Kunugita, K. Ema, K. Tanaka, T. Kondo, and R. Ito: “Third-Order Optical Nonlinearity in a Self-Organized Quantum-Well Material (C6H13NH3)2(CH3NH3)Pb2I7,” Nonlinear Opt. 22, 365–368 (1999).
S. Koh, T. Kondo, M. Ebihara, T. Ishiwada, H. Sawada, H. Ichinose, I. Shoji, and R. Ito: “GaAs/Ge/GaAs Sublattice Reversal Epitaxy on GaAs (100) and (111) Substrate for Nonlinear Optical Devices,” Jpn. J. Appl. Phys. 38, L508–511 (1999). DOI: 10.1143/jjap.38.L508.
I. Shoji, H. Nakamura, K. Ohdaira, T. Kondo, R. Ito, T. Okamoto, K. Tatsuki, and S. Kubota: “Absolute Measurement of Second-Order Nonlinear Optical Coefficients of β-BaB2O4 for Visible to Ultraviolet Second-Harmonic Wavelengths,” J. Opt. Soc. Am. B, 16, 620–624 (1999). DOI: 10.1364/JOSAB.16.000620.
S. Koh, T. Kondo, T. Ishiwada, C. Iwamoto, H. Ichinose, H. Yaguchi, T. Usami, Y. Shiraki, and R. Ito: “Sublattice Reversal in GaAs/Si/GaAs (100) Heterostructures by Molecular Beam Epitaxy,” Jpn. J. Appl. Phys. 37, L1493–1496 (1998). DOI: 10.1143/jjap.37.L1493.
J. Ishi, M. Mizuno, H. Kunugita, K. Ema, S. Iwamoto, S. Hayase, T. Kondo, and R. Ito: “Third-Order Optical Nonlinearity due to Excitons and Biexcitons in a Self-Organized Quantum-Well Material (C6H13NH3)2PbI4,” J. Nonlinear Opt. Phys. Mater. 7 153–159 (1998). DOI: 10.1142/S0218863598000120.
T. Kondo, S. Iwamoto, S. Hayase, K. Tanaka, R. Ito, J. Ishi, M. Mizuno, and K. Ema: “Resonant Third-Order Optical Nonlinearity in the Layered Perovskite-Type Material (C6H13NH3)2PbI4,” Solid State Commun., 105, 503–506 (1998). DOI: 10.1016/S0038-1098(97)10166-1.
T. Kondo, T. Azuma, T. Yuasa, and R. Ito: “Biexciton Lasing in the Perovskite-Type Material (C6H13NH3)2PbI4,” Solid State Commun. 105, 253–255 (1998). DOI: 10.1016/S0038-1098(97)10085-0.
I. Shoji, T. Kondo, A. Kitamoto, M. Shirane, and R. Ito: “Absolute Scale of the Second-Order Nonlinear Optical Coefficients,” J. Opt. Soc. Am. B 14, 2268–2294 (1997). DOI: 10.1364/JOSAB.14.002268.
N. Hashizume, T. Tsuruzono, T. Kondo, and R. Ito: “Fabrication of Periodic Waveguides Using Organic Crystals and Fluorinated Polyimides for Quasi-Phase-Matched Second-Harmonic Generation,” Opt. Rev.4, 316–320 (1997). DOI: 10.1007/s10043-997-0316-6.
T. Kondo and R. Ito: “A Comparative Study on Nonlinear Optical Properties of Chiral and Racemic 2-(α-Methylbenzylamino)-5-Nitropyridine Crystals,” Nonlinear Opt. 15, 163–166 (1996).
A. Kitamoto, T. Kondo, I. Shoji, and R. Ito: “Absolute Measurement of Second-Order Nonlinear Optical Coefficient of LiNbO3 by Parametric Processes,” Opt. Rev. 2, 280–284 (1995). DOI: 10.1007/s10043-995-0280-y.
N. Hashizume, M. Ohashi, T. Kondo, and R. Ito: “Optical Harmonic Generation in Multilayered Structures: A Comprehensive Analysis,” J. Opt. Soc. Am. B 12, 1894–1904 (1995). DOI: 10.1364/JOSAB.12.001894.
J. Wu, T. Kondo, and R. Ito: “Optimal Design for Broadband Quasi-Phase-Matched Second-Harmonic Generation Using Simulated Annealing,” IEEE J. Lightwave Tech. 13, 456–460 (1995). DOI: 10.1109/50.372442.
T. Kondo, F. Akase, M. Kumagai, and R. Ito: “Linear and Nonlinear Optical Properties of Racemic (±)2-(α-Methylbenzylamino)-5-Nitropyridine Single Crystals,” Opt. Rev. 2, 128–131 (1995). DOI: 10.1007/s10043-995-0128-5.
H. Takahashi, M. Ohashi, T. Kondo, N. Ogasawara, Y. Shiraki, and R. Ito: “New Semiconductor Second-Harmonic Generator Based on Quasi-Phase- Matching for Cavity-Enhanced Fundamental Standing Wave,” Jpn. J. Appl. Phys. 33, L1456–L1458 (1994). DOI: 10.1143/jjap.33.L1456.
J. Wu, C.Q. Xu, H. Okayama, M. Kawahara, T. Kondo, and R. Ito: “Broad-Band Second-Harmonic Generation in LiNbO3 Waveguide Using Optimized Domain-Inverted Grating,” Jpn. J. Appl. Phys. 33, L1163– L1166 (1994). DOI: 10.1143/jjap.33.L1163.
T. Kataoka, T. Kondo, R. Ito, S. Sasaki, K. Uchida, and N. Miura: “Magneto-Optical Effects of Excitons in the Layered Perovskite-Type Material (C6H13NH3)2(CH3NH3)Pb2I7,” Physica B 201, 423–426 (1994). DOI: 10.1016/0921-4526(94)91129-0.
J. Wu, T. Kondo, and R. Ito: “Computer-Aided Design of Waveguide Gratings Having Asymmetric Reflectivity Spectra,” Jpn. J. Appl. Phys. 32, 5576–5580 (1993). DOI: 10.1143/JJAP.32.5576.
J. Wu, T. Kondo, and R. Ito: “Design of Waveguide Grating Based on Simulated Annealing and Narrow-Band Modulation,” Jpn. J. Appl. Phys. 32, 4973–4979 (1993). DOI: 10.1143/JJAP.32.4973
M. Ohashi, T. Kondo, K. Kumata, S. Fukatsu, S.S. Kano, Y. Shiraki, and R. Ito: “Determination of Quadratic Nonlinear Optical Coefficient of AlxGa1-xAs System by the Method of Reflected Second Harmonics,” J. Appl. Phys. 74, 596–601 (1993). DOI: 10.1063/1.355272.
T. Kataoka, T. Kondo, R. Ito, S. Sasaki, K. Uchida, and N. Miura: “Magneto-Optical Study on the Excitonic Spectra of (C6H13NH3)2PbI4,” Physica B 184, 132–136 (1993).
T. Kataoka, T. Kondo, R. Ito, S. Sasaki, K. Uchida, and N. Miura: “Magneto-Optical Study on Excitonic Spectra in (C6H13NH3)2PbI4,” Phys. Rev. B 47, 2010–2018 (1993). DOI: 10.1103/PhysRevB.47.2010.
Y. Hase, K. Kumata, S.S. Kano, M. Ohashi, T. Kondo, R. Ito, and Y. Shiraki: “A New Method for Determining the Nonlinear Optical Coefficients of Thin Films,” Appl. Phys. Lett. 61, 145–146 (1992). DOI: 10.1063/1.108199
M. Ohashi, T. Kondo, K. Kumata, S. Fukatsu, S.S. Kano, Y. Shiraki, and R. Ito: “Nonlinear Optical Coefficients in AlAs Thin Film on GaAs Sub- strate,” Jpn. J. Appl. Phys. 31, L843–L845 (1992). DOI. 10.1143/JJAP.31.L843.
T. Kondo, C.-Q. Xu, and R. Ito: “Linear and Nonlinear Optical Properties of a Natural Quantum-Well Material (C10H21NH3)2PbI4,” Nonlinear Optics (S. Miyata ed., Elsevier) 323–328 (1992).
T. Uemiya, N. Uenishi, S. Okamoto, K. Chikuma, K. Kumata, T. Kondo, R. Ito, and S. Umegaki: “Frequency Doubling of a Nd:YAG Laser Using a Crystal-Cored Fiber of an Organic 4-(N, N-Dimethylamino)-3-Acetamidonitrobenzene,” Appl. Opt. 31, 7581–7586 (1992). DOI: 10.1364/AO.31.007581.
N. Hashizume, T. Kondo, T. Onda, N. Ogasawara, S. Umegaki, and R. Ito: “Theoretical Analysis of the Cerenkov-Type Optical Second-Harmonic Generation in Slab Waveguides,” IEEE J. Quantum Electron. 28, 1798–1815 (1992). DOI: 10.1109/3.142578.
K. Tsuda, T. Kondo, F. Saito, T. Kudo, and R. Ito: “New Fabrication Method of Channel Optical Waveguides of Organic Crystals Using an Inorganic Photoresist,” Jpn. J. Appl. Phys. 31, L134–L135 (1992). DOI: 10.1143/JJAP.31.L134.
T. Kondo, N. Hashizume, K. Tsuda, R. Morita, N. Ogasawara, S. Umegaki, and R. Ito: “Cerenkov-Type Optical Second-Harmonic Generation in Organic- Crystalline Channel Waveguides,” Int. J. Nonlinear Opt. Phys. 1, 367–392 (1992). DOI: 10.1142/S0218199192000182.
C.-Q. Xu, H. Sakakura, T. Kondo, S. Takeyama, N. Miura, Y. Takahashi, K. Kumata, and R. Ito: “Magneto-Optical Effects of Excitons in (C10H21NH3)2PbI4 under High Magnetic Fields up to 40 T,” Solid State Commun. 79, 249–253 (1991). DOI: 10.1016/0038-1098(91)90644-B.
C.-Q. Xu, T. Kondo, H. Sakakura, K. Kumata, Y. Takahashi, and R. Ito: “Optical Third-Harmonic Generation in Layered Perovskite-Type Material (C10H21NH3)2PbI4,” Solid State Commun. 79, 245–248 (1991). DOI: 10.1016/0038-1098(91)90643-A.
C.-Q. Xu, S. Fukuta, H. Sakakura, T. Kondo, R. Ito, Y. Takahashi, and K. Kumata: “Anomalous Electro-Absorption in the Low-Temperature Phase of (C10H21NH3)2PbI4,” Solid State Commun. 77, 923–926 (1991). DOI: 10.1016/0038-1098(91)90347-X.
S. Umegaki, T. Kondo, R. Morita, N. Ogasawara, and R. Ito: “Frequency Conversion and Modulation of Lasers,” Nonlinear Opt. 1, 253–272 (1991).
T. Kondo, R. Morita, N. Ogasawara, S. Umegaki, and R. Ito: “A Nonlinear Optical Organic Crystal for Waveguiding SHG Devices: (−)2-(α-Methylbenzylamino)-5-Nitropyridine (MBANP),” Jpn. J. Appl. Phys. 28, 1622–1628 (1989). DOI: 10.1143/JJAP.28.1622.
R. Morita, T. Kondo, Y. Kaneda, A. Sugihashi, N. Ogasawara, S. Umegaki, and R. Ito: “Mutiple-Reflection Effects in Optical Second-Harmonic Generation,” Jpn. J. Appl. Phys. 27, L1134–L1136 (1988). DOI: 10.1143/JJAP.27.L1134.
R. Morita, T. Kondo, Y. Kaneda, A. Sugihashi, N. Ogasawara, S. Umegaki, and R. Ito: “Dispersion of Second-Order Nonlinear Optrical Coefficient d11 of 2-Methyl-4-Nitroaniline (MNA),” Jpn. J. Appl. Phys. 27, L1131–L1133 (1988). DOI: 10.1143/JJAP.27.L1131.
T. Kondo, N. Ogasawara, R. Ito, K. Ishida, T. Tanase, T. Murata, and M. Hidai: “Structure of 5-Nitro-2-{[(S)-1-phenylethyl]amino}pyridine,” Acta Cryst. C44, 102–104 (1988). DOI: 10.1107/S0108270187008047.
I. Shoji, T. Kondo, and R. Ito, “Absolute Scale of Quadratic Nonlinear Optical Susceptibilities,” in ICO Book Vol. 4: International Trends in Optics and Photonics (T. Asakura, Ed., Springer-Verlag, 1999, pp.215–229).
T. Kondo and R. Ito: “Quadratic Nonlinear Optical Effects in Crystalline Waveguiding Structures,” in Molecular Nonlinear Optics (J. Zyss ed., Academic Press, 1994), Chapter 5 (pp. 201–243).
Conference Presentations (Presentations in which Kondo Lab. is the first author)(English)
Hanbo Jung, Zihao Liu, Masato Sotome, Gaurav Kapil, Shuzi Hayase, Takashi Kondo, "Vapor phase deposition of lead-free halide perovskite alloy CsSn1-xZnxBr3 (part II)", The 84th JSAP Autumn Meeting, 22p-C601-2 (2023). (oral presentation)
Z. Liu, H. Jung, M. Sotome and T. Kondo,"三温度法を用いた真空蒸着によるペロブスカイトCsSnBr3薄膜の作製 Vapor phase deposition of tin halide perovskite CsSnBr3 thin films with three-temperature method", The 84th JSAP Autumn Meeting, 22p-C601-4 (2023). (oral presentation)
Z. Liu, H. Jung, M. Sotome and T. Kondo,"Substrate temperature dependence of vapor phase deposited thin films of all inorganic lead free CsSnBr3 perovskite", The 9th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies,
C-3, June 2023, Kanazawa, Japan (2023). (oral presentation)
Hanbo Jung, Zihao Liu, Masato Sotome, Takashi Kondo,"Vapor phase deposition of lead-free halide perovskite alloy CsSn1-xZnxBr3", The 9th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies,
G-4, June 2023, Kanazawa, Japan (10:40~11:00 June 7th, 2023). (oral presentation)
Zihao Liu, T. Matsushita, M. Sotome, and T. Kondo, "Epitaxial growth of CH(NH2)2PbI3 thin films on CH3NH3PbBr3 single crystal substrates by vapor phase deposition". 2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) IEEE (2021, June).
Zihao Liu, Tomonori Matsushita, and Takashi Kondo, “Epitaxial growth of CH3NH3PbI3 thin films on CH3NH3PbCl3 single crystal substrates,” 第67回応用物理学会春季学術講演会, 2020年3月12–15日, 上智大学(13a-A402-8).
Wang Shumin, 松下智紀, 近藤高志, “周期空間反転GaAs/AlGaAs導波路における1 μm帯伝搬損失の波長/温度依存性,” 第67回応用物理学会春季学術講演会, 2020年3月12–15日, 上智大学 (12p-D215-12).
Y. Nakamura, N. Shibayama, A. Hori, T. Matsushita, H. Segawa, and T.Kondo, “Lattice parameters of lead halide perovskite alloy CH3NH3Pb(I1−xBrx)3,” The 8th NextPV International Workshop, November 17, 2019, Tokyo, Japan.
K. Kimura, T. Matsushita, Z. Liu, and T. Kondo, “Critical Thickness of Epitaxial CH3NH3Pb(IBr)3 Thin Films Formed on CH3NH3PbBr3 Single Crystal Substrates,” 2019 International Conference on Solid State De-vices and Materials (SSDM2019), September 2–5, 2019, Nagoya Univer-sity, Nagoya, Japan (C-2-04).
T. Kondo, K. Kimura, and T. Matsushita, “Epitaxy of Lead Halide Perovskites,” EMN Epitaxy 2019, June 19, 2019, Amsterdam, Netherlands.(Invited)
T. W. Kim, M. Kim, N. Shibayama, L. Cojocaru, S. Uchida, T. Kondo,and Hiroshi Segawa, “Real-time TEM observation of thermally induceddegradation in organometal halide perovskite,” シンポジウム「金属ハライドペロブスカイト型物質の応用物理」, 第79回応用物理学会秋季学術講演会, 2018年9月18–21日, 名古屋国際会議場 (18p-145-5).
S. Wang, T. Matsushita, T. Matsumoto, S. Yoshida, and T. Kondo, “Evaluation of Propagation Losses in Corrugation-Reduced GaAs/AlGaAs Periodically-Inverted Waveguides,” 2018 International Conference on Solid State Devices and Materials (SSDM2018), September 9–13, 2018, The Universityof Tokyo, Tokyo, Japan (PS-5-08, Poster).
T. Matsushita, S. Takashima, Y. Nakamura, and T. Kondo, “Fabrication of CH3NH3PbI3/CH3NH3PbCl3 Heterostructure using Vacuum Evaporation,” 2018 International Conference on Solid State Devices and Materials (SSDM2018), September 9–13, 2018, The University of Tokyo, Tokyo,Japan (PS-6-11, Poster).
K. Kimura, T. Matsushita, and T. Kondo, “Epitaxial Nature of CH3NH3Pb(BrI)3 Thin Films Formed on CH3NH3PbBr3 Single Crystal Substrates,” 2018 International Conference on Solid State Devices and Materials (SSDM2018), September 9–13, 2018, The University of Tokyo, Tokyo, Japan (F-4-03).
T.W. Kim, L. Cojocaru, S. Uchida, T. Matsushita, T. Kondo, and H. Segawa, “Self-Organized Superlattice and Phase Coexistence Inside the Perovskite Solar Cell Thin Film,” 2018 International Conference on Solid State Devices and Materials (SSDM2018), September 9–13, 2018, The University of Tokyo, Tokyo, Japan (F-4-02).
Y. Nakamura, T. Matsushita, and T. Kondo, “Fabrication of CH3NH3PbI3 polycrystalline thin films by vacuum deposition using gas sources,” Grand Renewable Energy 2018, June, 2018, Yokohama, Japan.
T. W. Kim, S. Uchida, T. Matsushita, L. Cojocaru, T. Kondo, H. Segawa, “Direct observation of self-organized superlattices and phase coexistence in organometal halide perovskite solar cell with transmission electron microscopy,” 第65回応用物理学会春季学術講演会, 2018年3月17–20日, 早稲田大学 (20a-G202-8).
M. Schulz, Y. Udagawa, Y. Nakamura, K. Kimura, C. Yura, K. Ya-mamoto, T. Matsushita, T. Kondo, H. Kunugita, and K. Ema, “Excitonstructure of perovskite single crystals (CH3NH3PbBr3 and CH3NH3PbI3),”International Conference on Perovskite Thin Film Photovoltaics (ABXPV18),February 28–29, 2018, Mercure Rennes Centre Gare Hotel, Rennes, France(Poster).
Y. Nakamura, T. Matsushita, S. Yamaguchi, and T. Kondo, “Defect chem-istry analysis on CH3NH3PbI3 toward conductivity control of lead-halideperovskites,” International Conference on Perovskite Thin Film Photo-voltaics (ABXPV18), February 28–29, 2018, Mercure Rennes Centre GareHotel, Rennes, France (Poster).
S. Uchida, T. W. Kim, L. Cojocaru, T. Kondo, and H. Segawa, “A new dis-covery of double phase coexistence inside the perovskite solar cells,” Inter-national Conference on Perovskite Thin Film Photovoltaics (ABXPV18),February 28–29, 2018, Mercure Rennes Centre Gare Hotel, Rennes, France(A2-6).
R. Suzuki, T. Matsushita, and T. Kondo, “GaAs/AlGaAs double-heterojunctionpin diodes with periodically inverted structure for nonlinear optical devices,” The 24th Congress of the International Commission for Optics(ICO-24), August 21–25, 2017, Keio Plaza Hotel, Tokyo (Tu1D-02).
K. Kimura, T. Matsushita, and T. Kondo, “Formation of Epitaxial Thin Films of Lead Halide Perovskite Semiconductor,” Photonics@SG 2017,31 July–4 August, 2017, Sands Expo and Convention Center, Singapore (3-3D-5).
K. Wang, Y. Nakamura, T. Kondo, and S. Yamaguchi, “The photoelectrochemical properties of methylammonium lead tribromide perovskite materials governed by ion migration and its application to photo-electrochemical devices,” 21st International Conference on Solid State Ionics, 18–23 June, 2017, Padua, Italy.
K. Wang, Y. Nakamura, T. Kondo, K. Kobayashi, and S. Yamaguchi, “The partial conductivity measurements on methylammonium lead tribromide perovskite materials,” 21st International Conference on Solid State Ionics, 18–23 June, 2017, Padua, Italy.
Taewoong Kim, Satoshi Uchida, Tomonori Matsushita, Ludmila Cojocaru, Takashi Kondo, Hiroshi Segawa, “Transmission electron microscopy observation of phase coexistence in organometal halide perovskite solar cell,” 第64回応用物理学会春季学術講演会, 2017年3月14–17日, パシフィコ横浜 (16a-303-2).
T. Kondo, “GaAs/AlGaAs waveguiding wavelength conversion devices,” SPIE Photonics West, OPTO, Conference 10111: Quantum Sensing and Nano Electronics and Photonics XIV, 28 January - 2 February 2017, San Francisco, California, USA (10111-68). (Invited)
A. Otsuka, K. Amazutsumi, T. Matsushita, and Takashi Kondo, “Elastooptic effects on quasi-phase-matching wavelengths of a periodically-inverted AlGaAs waveguide,” 7th EPS-QEOD EUROPHOTON Conference on Solid State, Fibre, and Waveguide Coherent Light Sources, August 21–26, 2016, TU Wien, Campus Gusshaus, Vienna, Austria (PO-1.44, 23 Aug.).
T. Matsushita and T. Kondo, “Recent progress of AlGaAs wavelength conversion devices,” International Symposium for Advanced Materials Research (ISAMR2016), August 12, 2016, SUN MOON LAKE TEACHERS’ HOSTEL, Sun Moon Lake, Taiwan. (Invited)
R. Suzuki, T. Matsushita, and T. Kondo, “Homojunction GaAs diode with periodically-inverted structure for nonlinear optical devices,” 43rd International Symposium on Compound Semiconductors (ISCS), June 26–30, Toyama International Conference Center, Toyama, Japan (TuB4-6).
Y. Nakamura, J. Sano, T. Matsushita, Y. Kiyota, Y. Udagawa, H. Kunugita, K. Ema, and T. Kondo, “Excitonic properties of CH3NH3PbI3 single crystals and polycrystalline thin films,” Tsinghua-UTokyo Workshop on Recent topics in Materials Physics, Science and Engineering, March 9–10, 2016, University of Tokyo, Tokyo Japan.
T. Kondo, “Electronic structures and optical properties of the lead-halide perovskites CH3NH3PbX3 (X =I, Br),” Tsinghua-UTokyo Workshop on Recent topics in Materials Physics, Science and Engineering, March 9–10, 2016, University of Tokyo, Tokyo Japan.
T. Kondo and T. Matsushita, “Wavelength conversion using quadratic optical nonlinearities in compound semiconductors,” EMN Hong Kong Meeting 2015, December 9–12, 2015, Eaton Hotel, Hong Kong (C32). (Invited)
T.W. Kim, T. Matsushita, and T. Kondo, “Infrared wavelength conver sion in AlGaAs: periodically inverted quasi phase matching and high-index-contrast birefringent phase matching devices,” The 2015 Materials Research Society of Korea Fall Meeting, November 26, 2015, Haeundae grand hotel, Busan, Korea (I-8). (Invited)
Y. Nakamura, J. Sano, T. Matsushita, Y. Kiyota, Y. Udagawa, H. Kunugita, K. Ema, and T. Kondo, “Exciton and Bandgap Energies of Hybrid Perovskite CH3NH3PbI3,” 2015 International Conference on Solid State Devices and Materials (SSDM 2015), September 27–30, 2015, Sapporo Convention Center, Japan (PS-15-1).
Y. Kiyota, Y. Udagawa, H. Kunuigta, Y. Takeoka, Y. Nakamura, T. Matsushita, T. Kondo, T. Miyasaka, and K. Ema, “Excitonic properties and carrier dynamics of CH3NH3PbBr3 single crystals,” 1st International Conference on Perovskite Solar Cells and Optoelectronics (PSCO-2015), 27–29 September, 2015, Lausanne, Switzerland.
T. Hashimoto, Y. Kiyota, Y. Udagawa, R. Ishii, Y. Kagaya, H. Kunugita, Y. Takeoka, K. Ema, Y. Nakamura, J. Sano, T. Matsushita, T. Kondo, and T. Miyasaka, “Optical and excitonic properties in lead-halide-basedperovskite-type crystals CH3NH3PbBr3,” 4th International Conferenceon Multifunctional, Hybrid and Nanomaterials (Hybrid Materials 2015), March 9–13, 2015, Sitges, Spain.
T. Matsushita, Y. Nakamura, S. Matsumoto, T. Onda, I. Shoji, and T. Kondo: “Fabrication of AlGaAs/AlOx waveguides with inversion-stacked core structure for higher-order modal-phase matching devices,” The 10th Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR 2013), June 30–July 4, 2013, Kyoto, Japan (WA3-3).
S. Yoshida, K. Hanashima, I. Ohta, T. Matsushita, and T. Kondo: “Reduced propagation losses in quasi-phase-matched GaAs/AlGaAs waveguides,” Conference on Lasers and Electro-Optics (CLEO 2013), June 9–14, 2013, San Jose, USA (JW2A.35).
Shigeki Yoshida, Kaori Hanashima, Ikuma Ohta, Tomonori Matsushita and Takashi Kondo, “Influence of anisotropic surface diffusion on AlGaAs MBE regrowth of periodically-inverted GaAs/AlGaAs waveguides,” The 17th International Conference on Molecular Beam Epitaxy (MBE2012), September 23–28, 2012, Nara, Japan, (MoP-66).
T. Matsushita and T. Kondo, “Design of inversion-stacked AlGaAs waveguiding wavelength convertors for higher-order-mode beam generation,” Topological lightwave synthesis and its applications (T-LWS 2012), July 5–6, 2012, Chiba University, Chiba, Japan, (5A-3) (Invited).
T. Matsushita, K. Murakami, K. Hara, Ichiro Shoji, and T. Kondo, “Fabrication of AlGaAs waveguides with laterally inverted core structure for higher-order modal phase matching devices,” 8th Asia Pacific Laser Symposium (APLS 2012), May 27–30, 2012, Huangshan City, Anhui, China, (O3.1).
T. Matsushita, S. Yoshida, J. Ota, and T. Kondo, “Influence of anisotropic diffusion of Ga and Al atoms during AlGaAs growth for periodically inverted AlGaAs waveguides,” Conference on Laser and Electro-Optics (CLEO2012), May 6–11, 2012, San Jose, USA (CTh3D.3).
T. Matsushita, K. Iwamoto, J. Ota, and T. Kondo, “Periodic modulation of Al composition in a periodically-inverted AlGaAs waveguide,” Nonlinear Optics (NLO), July 17–22, 2011, Kauai, USA (NTuE4).
K. Amazutsumi, J. Ota, T. Matsushita, and T. Kondo, “Impact of photoelastic effect on phase-matching wavelengths in periodically-inverted AlGaAs waveguides,” Nonlinear Optics (NLO), July 17–22, 2011, Kauai, USA (NTuE3).
T. Matsushita and T. Kondo, “Hybrid modal-phase-matched and bent-quasi-phase-matched wavelength conversion in AlGaAs/SiO2 rib-type zigzagwaveguides,” CLEO: Science and Innovations 2011, May 1–6, 2011, Balti-more, USA (JThB90).
T. Matsushita, T.W. Kim, and T. Kondo, “Phase-matched second-harmonic generation in high-index contrast AlGaAs waveguides,” 3nd International Conference on Silicon Photonics, January 24, 2011, Ghent University, Belgium.
T. Matsushita, J. Ota, I. Ohta, and T. Kondo, “Quasi-phase-matched second-harmonic generation in high-quarity AlGaAs waveguides pumped at 1.55 µm,” The 2010 Frontiers in Optics (FiO)/Laser Science XXVI (LS) Conference, October 24–28, 2010, Rochester, New York, USA (FThH2).
T.W. Kim, H. Ishikawa, T. Matsushita, and T. Kondo, “Experimental observation of phase-matched wavelength conversion in a thin rectangular high-index-contrast AlGaAs waveguide,” The 6th TU-UT-SNU Student Workshop, October 13–16, 2010, Seoul National University, Korea, P. 142.
K. Hanashima, I. Ohta, J. Ota, T. Matsushita, and T. Kondo, “Quasi-phase-matched difference-frequency generation at 3.4 µm in high-quality GaAs/AlGaAs waveguides,” 2010 International Conference on Solid State Devices and Materials (SSDM 2010), September 22–24, 2010, Tokyo, Japan (D-1-2).
T.W. Kim, H. Ishikawa, T. Matsushita, and T. Kondo, “Fabrication of thin rectangular high-index-contrast AlGaAs waveguides for efficient wavelength conversion,” 4th EPS-QEOD Europhoton Conference (EUROPHOTON 2010), August 29–September 3, 1010, Hamburg, Germany (WeP25).
T. Matsushita, H. Ishikawa, and T. Kondo, “Highly-efficient quasi-phase-matched wavelength conversion in GaP/AlOx zigzag waveguides,” Integrated Photonics Research, Silicon and Nano Photonics (IPR), July 25–28, 2010, Monterey, USA (JTuB21).
T. Kondo, “Infrared wavelength conversion in semiconductor waveguides,” 15th Optoelectronics and Communications Conference (OECC2010), July 5–9, 2010, Sapporo, Japan (7D1-1) (invited).
K. Amazutsumi, J. Ota, and T. Kondo, “Strain-induced birefringence and phase-matching characteristics of a periodically-inverted AlGaAs waveguide,” 2010 International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2010), June 22-25, 2010, Toyama, Japan (P1-40).
K. Amazutsumi, J. Ota, and T. Kondo, “High-resolution x-ray diffraction study on periodically-inverted AlGaAs epilayers,” JSPS Asian CORE Program Workshop on Materials Science and Engineering (Student Workshop on Materials Science and Engineering between Tsinghua University and the University of Tokyo), May 14, 2010, Tokyo, Japan.
Takashi Kondo, “Wavelength conversion via quadratic nonlinear optical effects in semiconductor waveguides,” 2nd International Conference on Silicon Photonics, January 22, 2010, Boston, USA (invited).
M. Abe, H. Sato, J. Suda, M. Yoshimura, Y. Kitaoka, Y. Mori, I. Shoji, and T. Kondo, “Accurate determination of quadratic nonlinear optical coefficients of gallium nitride,” The 5th TU-UT-SNU Student Workshop on Advannce in Materials Science and Engineering, October 14–17, 2009, Beijing, China.
M. Abe, H. Sato, J. Suda, M. Yoshimura, Y. Kitaoka, Y. Mori, I. Shoji, and T. Kondo, “Accurate Measurement of Nonlinear Optical Coefficients of Gallium Nitride,” 2009 International Conference on Solid State Devices and Materials (SSDM 2009), October 7–9, 2009, Sendai, Japan (I-9-5).
T. Kondo: “Epitaxial growth of III-V compound semiconductors with spatial inversion structures—applications to quasi-phase-matched nonlinear optical devices,” International Conference on Processing & Manufacturing of Advanced Materials (Thermec 2009), August 25–29, 2009, Berlin, Germany (invited).
T. Kondo: “Wavelength conversion in semiconductor waveguiding devices,” Nonlinear Optics (NLO 2009), July 12–17, 2009, Honolulu, USA, JTuA6 (invited).
T. Kondo: “Semiconductor guided-wave wavelength conversion devices,” Conference on Lasers and Electro-Optics (CLEO 2009), May 31–June 5, 2009, Baltimore, USA, CThD4 (invited).
T. Kondo, T. Matsushita, J. Ota, K. Hanashima, T.-W. Kim, I. Ohta, and H. Ishikawa, “Wavelength conversion via quadratic nonlinearities in compound semiconductors,” 1st International Conference on Silicon Photonics, January 23, 2009, The University of Tokyo, Tokyo, Japan.
T. Kondo: “Wavelength conversion devices based on semiconductor waveguides,” 第9回マイクロ固体フォトニクス専門委員会講演会「擬似位相整合非線形光学波長変換の現状と展望」, 2008年11月20日, 分子科学研究所.
M. Abe, H. Sato, J. Suda, I. Shoji, and T. Kondo: “Accurate measurement of nonlinear optical coefficients of 6H silicon carbide by rotational Maker-fringe technique,” The 4th UT-SNU-TU Student Workshop, October 21–22, 2008, Hakone, Japan.
T. Matsushita, I. Ohta, and T. Kondo: “Fabrication of periodically-inverted GaP/AlGaP waveguides for quasi-phase matching nonlinear optical devices,” IEEE Nanotechnology Materials and Devices Conference 2008, October 20–22, 2008, Kyoto, Japan (TuA II-2).
M. Abe, H. Sato, J. Suda, I. Shoji, and T. Kondo: “Accurate Measurement of Nonlinear Optical Coeffcients of 6H Silicon Carbide by Rotational Maker-Fringe Technique,” 2008 International Conference on Solid State Devices and Materials (SSDM 2008), September 24–26, 2008, Tsukuba, Japan (E-2-5).
J. Ota, W. Narita, I. Ohta, T. Matsushita, and T. Kondo: “Quasi-Phase-Matched Second-Harmonic Generation in AlGaAs Waveguides Pumped at 1.5 µm,” 2008 International Conference on Solid State Devices and Materials (SSDM 2008), September 24–26, 2008, Tsukuba, Japan (E-2-1).
H. Sato, I. Shoji, J. Suda, and T. Kondo: “Accurate Measurements of Second-Order Nonlinear-Optical Coefficients of Silicon Carbide,” 7th European Conference on Silicon Carbide and Related Materials, September 7–11, 2008, Barcelona, Spain (MoP-60).
J. Ota and T. Kondo: UT-TU Student Workshop, May, 2008, Beijing, China.
I. Ohta, T. Matsushita, J. Ohta, and T. Kondo: “Quasi Phase Matched Parametric Fluorescence in High-Quality GaAs/AlGaAs Waveguides,” Advanced Solid-State Photonics, January 27–30, 2008, Nara, Japan (MC31).
I. Ohta, T. Matsushita, and T. Kondo: “Optical Parametric Process in a Quasi Phase Matching GaAs/AlGaAs Waveguiding Devices,” The 3rd SNU-UT-TU Student Workshop —Advanced Functional Materials—, October 25–26, 2007, Seoul, Korea.
M. Abe, K. Maruyama, H. Sato, H. Tanaka, J. Suda, I. Shoji, and T. Kondo, “Accurate Determination of Nonlinear Optical Coefficients of Hexagonal Silicon Carbide of Polytype 6H,” Nonlinear Optics: Materials Fundamentals and Applications, July-August 2007, Hawaii, USA (WE25).
T. Matsushita, T. Yamamoto, and T. Kondo, “Epitaxial Growth of Inverted GaP for Quasi Phase Matching Nonlinear Optical Devices,” CLEO/Europe 2007, June 2007, Munich, Germany (CD5-2-WED).
T. Matsushita and T. Kondo: “Fabrication of Spatially-Inverted GaP by Sublattice Reversal Epitaxy,” 4th COE 21 International Symposium, October 2006, Tokyo, Japan. (Proceedings p. 92 (P-76))
T. Matsushita and T. Kondo: “Sublattice Ordering of GaP Grown on Si/GaP(100) by Molecular Beam Epitaxy,” The 2nd TU-UT-SNU Student Workshop, October 2006, Beijing, China.
T. Matsushita, T. Yamamura, T. Koitabashi, and T. Kondo: “Surface-Flatness Control of GaAs and AlGaAs Grown by Molecular Beam Epitaxy on Alternately Inverted GaAs (100) Substrates,” 25th Electonic Materials Symposium, July 2006, Izunokuni, Japan. (Proceedings p. 186)
T. Matsushita and T. Kondo: “GaP/Si/GaP(100) Sublattice Reversal Epitaxy,” The 5th UT2 Workshop, June 2006, Tokyo, Japan.
T. Kondo: “Sublattice Reversal Epitaxy of Compound Semiconductors and its Application to Quasi Phase-Matching Wavelength Conversion Devices,” The 7th China-Japan Symposium on Thin Films, September 20–22, 2004, Chengdu, China (78–91).
T. Matsushita, H. Tachibana, S. Koh, and T. Kondo: “Fabrication of Periodically-Inverted GaAs Waveguides for Quasi-Phase-Matching Nonlinear Optical Devices,” CLEO/Pacificm Rim 2003, December 15–19, 2003, Taipei, Taiwan (TU4F-(5)-6).
M. Toda, K. Ohashi, D. Ichii, K. Umeda, J. Ishi-Hayase, H. Kunugita, K. Ema, K. Tanaka, and T. Kondo, “Influence of Spin Relaxation on Excitonic Nonlinearity in Organic-Inorganic Hybrid Quantum-Well Matrials,” EQEC 2003, June 22–27, 2003, Munich, Germany (EB6W).
K. Tanaka, T. Kondo, and K. Ema: “Dielectrically Enhanced Binding Energies of Excitons in an Inorganic-Organic Quantum Well Crystal,”CLEO/Europe 2003, June 22–27, 2003, Munich, Germany (CG6-5-THU).
H. Tachibana, T. Matsushita, K. Ara, and T. Kondo: “Quasi-Phase-Matched Parametric Fluorescence in Periodically Inverted GaAs Waveguides,” Conference on Lasers and Electro-Optics (CLEO2003), June 1–6, 2003, Baltimore, USA (CMA6).
K. Tanaka, Y. Nabeshima, T. Kondo, R. Ito, and K. Ema: “Electric-Field Effect on 2s Excitons of a Natural-Quantum-Well Crystal (C6H13NH3)2PbI4,” Nonlinear Optics, July 29–August 2, 2002, Maui, USA (ThB7).
K. Ohashi, Y. Kato, D. Ichii, H. Kunugita, K. Ema, K. Tanaka, T. Takahashi, and T. Kondo: “Exciton Dynamics and Spin Relaxation in an Organic-Inorganic Hybrid Quantum-Well Material,” Nonlinear Optics, July 29–August 2, 2002, Maui, USA (WE27).
K. Tanaka, T. Takahashi, and T. Kondo: “Bandgap Energy and Binding Energies of the Two-Dimensional Wannier Excitons in a Layered-Perovskite-Type Crystal (C6H13NH3)2PbI4,” The 5th International Conference on Excitonic Processes in Condensed Matter (EXCON) 2002, July 22–26, 2002, Darwin, Australia.
Y. Kato, D. Ichii, K. Ohashi, H. Kunugita, K. Ema, K. Tanaka, T. Takahashi, and T. Kondo: “Exciton-Biexciton Dynamics in an Organic-Inorganic Hybrid Quantum-Well Material,” Quantum Electronics and Laser Science Conference (QELS2002), May 19–24, 2002, Long Beach, USA (QThG33).
K. Tanaka, F. Sano, T. Takahashi, and T. Kondo: “Two-Dimensional Excitons in a Layered Perovskite-Type Crystal (C6H13NH3)2PbI4,” Quantum Electronics and Laser Science Conference (QELS2002), May 19–24, 2002, Long Beach, USA (QWA25).
K. Ema, J. Ishi, H. Kunugita, and T. Kondo: “Serial-Parallel Conversion of High-Speed Optical Bit Stream by Highly Efficient Nonlinear Materials,” OECC/IOOC 2001, July 1–5, 2001, Sydney, Australia (invited).
K. Ema, J. Ishi, H. Kunugita, and T. Kondo: “Serial-to-Parallel Conversion of T-bit/s Optical Signals by an Organic-Inorganic Quantum-Well Material,” FST2001 (The 8th International Workshop on Femtosecond Technology), June 28–29, 2001, Tsukuba, Japan (invited).
J. Ishi, Y. Kato, H. Kunugita, K. Ema, T. Ban, and T. Kondo: “Biexcitonic Contribution to Four-Wave Mixing in a Self-Organized Quantum-Well Material,” IQEC 2000, September 10–15, Nice, France (QThD98).
S. Koh, T. Kondo, Y. Shiraki, and R. Ito: “AlGaAs QPM Waveguides Fabricated by GaAs/Ge/GaAs(100) Sublattice Reversal Epitaxy,” CLEO/Europe, September 10–15, 2000, Nice, France (CFA5).
S. Koh, T. Kondo, Y. Shiraki, and R. Ito: “Growth of Periodically Domain-Inverted AlGaAs Thin Films for QPM Waveguides using Sublattice Reversal Epitaxy,” 11th International Conference on Molecular Beam Epitaxy, September 10–14, 2000, Beijing, China (We1.1) (Invited).
S. Koh, T. Kondo, Y. Shiraki, and R. Ito: “Fabrication of Periodically Domain-Inverted AlGaAs Quasi-Phase-Matched Devices by GaAs/Ge/GaAs Sublattice Reversal Epitaxy,” SSDM 2000, August 29–31, 2000, Sendai (D-8-4).
Y. Hirobe, N. Ogawa, H. Kunugita, K. Ema, T. Ban, and T. Kondo: “Generation of Coherent Phonon Oscillations in PbI2 Thin Films,” Nonlinear Optics, Materials, Fundamentals and Applications, August 6–10, 2000, Kauai, USA (TuB29).
J. Ishi, Y. Kato, H. Kunugita, K. Ema,T. Ban, and T. Kondo: “Transient Nondegenerate Four-Wave Mixing Signal Induced by Exciton-Exciton Interactions in a Self-Organized Quantum-Well Material,” Nonlinear Optics, Materials, Fundamentals and Applications, August 6–10, 2000, Kauai, USA (TuC2).
S. Koh, T. Kondo, Y. Shiraki, and R. Ito: “Periodically Domain-Inverted AlGaAs Quasi-Phase-Matched Frequency Conversion Waveguides,” Non- linear Optics, Materials, Fundamentals and Applications, August 6–10, 2000, Kauai, USA (ThB23).
T. Kondo, S. Koh, and R. Ito: “AlGaAs QPM Waveguides Fabricated by Sublattice Reversal Epitaxy,” The 2nd International Symposium on Laser, Scintillator and Nonlinear Optical Materials, May 28–31, 2000, Lyon, France (Invited).
K Ema, J. Ishi, H. Kunugita, T. Kondo, T. Hiramatsu, T. Takahashi, Y. Kato, and T. Ban: “All-Optical Temporal-Spatial Conversion using a Four-Wave-Mixing Process in a Self-Organized Quantum-Well Material,” Conference on Lasers and Electro-Optics (CLEO), May 7–12, 2000, San Francisco, USA (CTuA25).
S. Koh and T. Kondo: “Sublattice-Reversal Epitaxy for QPM Devices,” 分子科学研究所研究会高機能全固体レーザーとその応用 —非線形光学材料／素子の新展開—, 1999年10月29日, 岡崎.
S. Nakatani, S. Kusano, T. Takahashi, K. Hirano, S. Koh, T. Kondo, and R. Ito: “Study of Sublattice Inversion in GaAs/Ge/GaAs(001) Crystal by X-ray Diffraction,” 3rd International Symposium on Control of Semiconductor Interfaces, October 25–29, 1999, Karuizawa, Japan.
J. Ishi, H. Kunugita, K. Ema, T. Ban, T. Kondo, K. Tanaka, and R. Ito: “Nondegenerate Four-Wave Mixing from Two-Exction States in a Self-Organized Quantum-Well Material,” CLEO Pacific Rim ’99, August 30–September 3, 1999, Seoul, Korea (FG2).
S. Koh, T. Kondo, M. Ebihara, T. Ishiwada, H. Sawada, H. Ichinose, I. Shoji, and R. Ito: “GaAs/Ge/GaAs Sublattice Reversal Epitaxy for Nonlinear Optical Devices,” 9 th International Conference on Modulated Semiconductor Structures, July 12–16, 1999, Fukuoka, Japan.
T. Kondo, S. Koh, T. Ishiwada, M. Ebihara, and R. Ito: “Sublattice Reversal Epitaxy and its Application to Nonlinear Optics,” Japan-China Bilateral Symposium on Novel Methods for Preparation and Evaluation of Coatings, March 1999, Tokyo, Japan.
T. Kondo, E. Nishina, R. Katayama, R. Ito, J.-C. Kim, T. Watanabe, and S. Miyata: “Design and Fabrication of Organic Waveguiding Dvices for Quasi-Phase-Matched Second-Harmonic Generation,” 4th International Conf. Organic Nonlinear Optics (ICONO’4), October 1998, Chitose, Japan.
T. Kondo and R. Ito: “Structured Semiconductors for Quadratic Nonlinear Optics,” 3rd Mediterranean Workshop and Topical Meeting–Novel Optical Materials and Applications (NOMA), June 1997, Cetraro, Italy (Invited Talk).
T. Kondo, K. Morita and R. Ito: “Second-Order Nonlinear Optical Properties of Wide-Bandgap Semiconductors,” Nonlinear Optics: Materials, Fundamentals, and Applications, July 1996, Maui, USA.
T. Kondo and R. Ito: “A Comprehensive Study on Nonlinear Optical Properties of Chiral and Racemic 2-(α-Methylbenzylamino)-5-Nitropyridine Crystals,” 2nd International Conference on Organic Nonlinear Optics (ICONO’2), July 1995, Kusatsu.
T. Kondo, T. Kataoka, and R. Ito: “Large Third-Order Nonlinearities in the Lead-Iodide-Based Layered Perovskite-Type Materials,” 2nd Mediterranean Workshop and Topical Meeting–Novel Optical Materials and Applications (NOMA), May 1995, Cetraro, Italy.
T. Kondo, S. Koh, T. Tsunoda, A. Ohkubo, Y. Shiraki, and R. Ito: “Reflected Second-Harmonic Ellipsometry—A New Tool for Determining the Nonlinear Optical Coefficients of Thin Films,” European Quantum Electronics Conference (EQEC’94), September 1994, Amsterdam, Netherlands.
T. Kondo, T. Kataoka, R. Ito, S. Sasaki, K. Uchida, and N. Miura: “Magnetooptical Effects of Excitons in the Layered Perovskite-Type Material (C6H13NH3)2(CH3NH3)Pb2I7,” Frontiers in High Magnetic Fields (FHMF’93), November 1993, Tokyo.
T. Kondo and R. Ito: “Microfabrication of Nonlinear Optical Organic Crystals for Second-Harmonic Generation,” International Symposium on Polymers (POLYMEX’93), November 1993, Cancún, Mexico.
T. Kondo, Y. Taito, R. Ito, and T. Kudo: “Microfabrication of Nonlinear Optical Organic Crystals Using an Inorganic Photoresist,” The 3rd IUMRS International Conference on Advanced Materials (IUMRS-ICAM-93), September 1993, Tokyo.
M. Ohashi, T. Kondo, R. Ito, S. Fukatsu, Y. Shiraki, and S.S. Kano: “Harmonic Generation from Multilayered Semiconductor Structures,” 16th Congress of the International Commission for Optics (ICO-16), August 1993, Budapest, Hungary.
T. Kondo, I. Shoji, K. Yashiki, and R. Ito: “Absolute Measurements of Second-Harmonic Generation Coefficients Using a Laser Diode,” Nonlinear Optics: Materials, Fundamentals, and Applications (NLO’92), August 1992, Maui, USA.
T. Kondo, I. Shoji, K. Yashiki, and R. Ito: “Absolute Nonlinear Optical Coefficient Measurement of Lithium Niobate Using a Laser Diode,” XVIII International Quantum Electronics Conference (IQEC’92), June 1992, Vienna, Austria.
T. Kondo, C.-Q. Xu, and R. Ito: “Linear and Nonlinear Optical Properties of a Natural Quantum-Well Material (C10H21NH3)2PbI4,” The 5th Toyota Conference on Nonlinear Optical Materials, December 1991, Nisshin.
T. Kondo and R. Ito: “Optical Second-Harmonic Generation in Organic-Crystalline Waveguides,” International Workshop on Solid State Materials, August 1991, Kuala Lumpur, Malaysia.
T. Kondo and R. Ito: “Optical Second-Harmonic Generation in Organic-Crystalline Channel Waveguides,” 微小光学研究会, 1991年2月, 東京.
T. Kondo, N. Hashizume, S. Miyoshi, R. Morita, N. Ogasawara, S. Umegaki, and R. Ito: “Second-Harmonic Generation with Laser Diodes and Organic Channel Waveguides,” Nonlinear Optics: Materials, Phenomena and Devices (NLO’90), July 1990, Kauai, USA.
T. Kondo, N. Hashizume, S. Miyoshi, R. Morita, N. Ogasawara, S. Umegaki, and R. Ito: “Frequency Doubling of Laser Diode Light in Organic Channel Waveguides,” SPIE’s 34th Annual International Technological Symposium, July 1990, San Diego, USA.
T. Kondo, N. Ogasawara, S. Umegaki, and R. Ito: “Linear and Nonlinear Optical Properties of 2-(α-Methylbenzylamino)-5-nitropyridine,” SPIE’s 32nd Annual International Technological Symposium, August 1988, San Diego, USA.
T. Kondo, N. Ogasawara, S. Umegaki, and R. Ito: “Nonlinear Optical Properties of 2-(α-Methylbenzylamino)-5-nitropyridine,” Symposium on Nonlinear Optics of Organics and Semiconductors, July 1988, Tokyo.
March 2024 Kouaki Fujikawa (B.S.), Graduation Thesis Award (Department of Materials Science and Engineering). .
Mar 2024 Kohaki Fujikawa (Bachelor), Dean of Engineering Award (Research) (Department of Materials Science and Engineering).
42nd (Spring 2017) Japan Society of Applied Physics Award for Encouragement of Presentation: Ryosuke Suzuki, Tomonori Matsushita, Takashi Kondo, "EL characteristics of periodic space inversion GaAs/AlGaAs double heterostructure p-i-n diodes,".
March 2012 Shigeki Yoshida, Japan Institute of Metals and Iron and Steel Institute of Japan Scholarship Award. .
Mar. 2012, Kohji Ametsutsumi (M.S.), Dean's Award of the Graduate School of Engineering (Research). .
Mar. 2012, Makoto Abe (Doctoral Student), Dean's Award of Graduate School of Engineering (Research).
Taizo Masuda, Ken-ichi Okumura, Takashi Kondo, Tomonori Matsushita, Photovoltaic device and its manufacturing method. Special Publication 2014-75495, (2014).
