Presentations -
-
Growth of orthorhombic κ-Ga₂O₃ thin films on N-polar GaN by mist chemical vapor deposition
Misaki Nishikawa, Masatoshi Koyama, Akihiko Fujii, Toshihiko Maemoto
International conference European Material Research Society Fall Meeting ( Warsaw, Poland ) Poster (general)
2025.09 -
Growth of orthorhombic κ-(In1-xGax)2O3 thin films on (111) 3C-SiC templates via mist chemical vapor deposition
Masatoshi Koyama, Yuma Tanaka, Misaki Nishikawa, Shunsuke Enoki, Akihiko Fujii, Toshihiko Maemoto
International conference European Material Research Society Fall Meeting ( Warsaw, Poland ) Oral Presentation(general)
2025.09 -
Nonlinear Electrical Transport by Doping Effects on Graphene/MoS2van der Waals Heterostructure
A. Fujimoto, K. Mimura, T. Hasegawa, M. Koyama, Y. Harada, T. Maemoto
International conference The 26th International Conference on Electronic Properties of 2D Systems & the 22nd International Conference on Modulated Semiconductor Structures(The 26th EP2DS / The 22th MSS) ( St. Louis, U.S.A. ) Poster (general)
2025.07-2025.08 -
Nonlinear Electron Transport Properties in InAs/GaxIn1-xAs/InAs Low-Barrier Heterostructure Diodes
Ryo Kawano, Moto Inoue, Yoshihisa Hosomi, Masatoshi Koyama, Akihiko Fujii, and Toshihiko Maemoto
International conference 2025 Asia-Pacific Workshop on Advanced Semiconductor Devices ( Nara, Japan ) Oral Presentation(general)
2025.07 -
Fabrication and Characterization of Amorphous GaOx Thin Film UV-C Photodetectors on Quartz Glass
Shunsuke Enoki, Iori Yamasaki, Misaki Nishikawa, Masatoshi Koyama, Akihiko Fujii, and Toshihiko Maemoto
International conference 2025 Asia-Pacific Workshop on Advanced Semiconductor Devices ( Nara, Japan ) Oral Presentation(general)
2025.07 -
Characterization of physical properties and UV photoresponse of amorphous GaOx thin films grown on c-plane sapphire substrates by mist CVD method
Iori YAMASAKI, Shunsuke ENOKI, Misaki NISHIKAWA, Masatoshi KOYAMA, Akihiko FUJII, Toshihiko MAEMOTO
Internal meeting Oral Presentation(general)
2025.06 -
Electron-Beam Deposition with Low Spitting Silver Source Material Improved by New Impurity Removal Processes
Y. Fujimoto, T. Kobayashi, M. Koyama, Y. Shindo
International conference The 39th International Conference on Compound Semiconductor Manufacturing Technology (CS MANTECH) ( New Orleans, U.S.A. ) Poster (general)
2025.05 -
Heat Resistance Improvement of Palladium Pre Plated Frames of Semiconductor Packaging with a New Additive for Nickel Plating
S. Sekiguchi, S. Mizuhashi, Y. Sato, M. Koyama, Y. Shindo
International conference The 39th International Conference on Compound Semiconductor Manufacturing Technology (CS MANTECH) ( New Orleans, U.S.A ) Oral Presentation(general)
2025.05 -
Achieving High Current Density in AlOx/ZnO Multilayer TFTs for Flexible OLED Applications through Low-Temperature Post Annealing
Kensuke Nakata, Kaiko Yuge, Akira Fujimoto, Hideo Wada, Masatoshi Koyama, Akihiko Fujii, and Toshihiko Maemoto
International conference The 2024 International Meeting for Future of Electron Devices, Kansai ( Ryukoku Univ. Fukakusa Campus (Jojukan), Kyoto, Japan ) Poster (general)
2024.11 -
Thickness Controle in CH3NH3PbI3 Thin Film Fabrication by Bar-Coating Method for Solar Cell Application
Masaki Horie, Masatoshi Koyama, Toshihiko Maemoto, Akihiko Fujii
International conference The 16th Asian Conference on Organic Electronics(A-COE 2024) ( I-site Namba, Osaka, Japan ) Poster (general)
2024.11 -
Effect of Post-annealing on Structural and Optical Properties of Mist-CVD Grown Amorphous Ga2O3 Thin Films
Manami Miyazaki, Iori Yamasaki, Yuma Tanaka, Masatoshi Koyama, Akihiko Fujii, and Toshihiko Maemoto
International conference The 11th Asia-Pacific Workshop on Widegap Semiconductors (APWS 2024) ( Busan, Korea ) Poster (general)
2024.10 -
Low Temperature Growth of Amorphous Ga2O3 on C-plane Sapphire Substrates by Mist Chemical Vapor Deposition
Iori Yamasaki, Manami Miyazaki, Yuma Tanaka, Masatoshi Koyama, Akihiko Fujii, and Toshihiko Maemoto
International conference The 11th Asia-Pacific Workshop on Widegap Semiconductors (APWS 2024) ( Busan, Korea ) Poster (general)
2024.10 -
UV Detection Properties of Mist CVD Grown Amorphous Ga2O3 Thin Films
Internal meeting Oral Presentation(general)
2024.08 -
Weak Localization and Gas Sensing of Graphene
Akira Fujimoto, Shoji Maeda, DaijuTerasawa, Akira Fukuda, Masatoshi Koyama, Kazuto Koike, Yoshiyuki Harada, ZhigangJiang, Eric M. Vogel
International conference 36th International Conference on the Physics of Semiconductors ( Ottawa, Canada ) Poster (general)
2024.07-2024.08 -
Electron-beam Deposition with Low Spitting Platinum Source Material Improved by New Impurity Removal Processes
Atsushi Kawashimo, Takahiro Kobayashi, Masatoshi Koyama, and Yuichiro Shindo
International conference International Conference on Compound Semiconductor manufacturing Technology ( Tuson, Arizona, U.S.A. ) Oral Presentation(general)
2024.05 -
Low-temperature fabrication process of In2O3 thin-film transistors using aqueous precursor solution and excimer light
Takeaki Komai, Ryosuke Kasahara, Hideo Wada, Masatoshi Koyama, Akihiko Fujii, Toshihiko Maemoto, Akihiro Shimizu, Noritaka Takezoe and Hiroyasu Ito
International conference International Meeting for Future Electron Devices, Kansai (IMFEDK) ( Avanti Kyoto Hall, Kyoto, Japan) ) Poster (general)
2023.11 -
Fabrication and characterization of low barrier height InAs/GaxIn1-xAs/InAs heterostructure diodes toward millimeter-wave detection
Moto Inoue, Masatoshi Koyama, Toshihiko Maemoto, and Shigehiko Sasa
International conference 48th CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES ( Montreal, Canada ) Poster (general)
2023.09 -
Study for enhanced THz radiation using InGaSb/InAs heterostructures
Yoshiyuki Takagi, Takayuki Hasegawa, Masatoshi Koyama, Toshihiko Maemoto, and Shigehiko Sasa
International conference 14th Topical Workshop on Heterostructure Microelectronics ( Hiroshima ) Poster (general)
2022.08-2022.09 -
Can longitudinal optical phonons obtain longer decay time by introducing defects with the use of surface treatments? A terahertz time-domain spectroscopic study on GaAs epilayers
HideoTakeuchi, Yuto Omuku, Ryota Onoda, Toshihiro Nakaoka, Jun Utsumi, Shigeo Kawasaki , Masatoshi Koyama
International conference International Conference on the Physics of Semiconductors 2022 ( Sydney, Australia ) Poster (general)
2022.06 -
HZOバッファ層を用いたMOD法によるR 面サファイア基板上への VO2 薄膜の作製
豊田和晃, 扶川 泰斗, 大内 涼介, 小池 一歩, 小山 政俊, 和田英男, 河原正美
Internal meeting 第30回（2021年度）日本赤外線学会研究発表会 ( オンライン ) Poster (general)
2021.10