Presentations -
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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 -
Terahertz time-domain spectroscopy of GaAs epitaxial layers treated with the use of fast atom bombardment
Hideo Takeuchi, Yuto Omuku, Ryota Onoda, Toshihiro Nakaoka, Jun Utsumi, Shigeo Kawasaki, and Masatoshi Koyama
International conference 31st International Conference on Defects in Semiconductors (ICSD31) 2021 ( Oslo ) Poster (general)
2021.07 -
Structural Analysis and Characterization of Bilayer AZO Thin Film Transistor by SolutionProcess
Kazuyori Oura, Keisuke Takano, Hideo Wada, Masatoshi Koyama, Toshihiko Maemoto and Shigehiko Sasa
International conference 33rd International Microprocesses and Nanotechnology Conference (MNC 2020) ( Online ) Oral Presentation(general)
2020.11 -
Development of terahertz optical sources for excitation wavelength of 1.56 μm
Daichi Shimada, Ryota Ohashi, Masatoshi Koyama, Toshihiko Maemoto, Shigehiko Sasa, Kosuke Okada, Hironaru Murakami, and Masayoshi Tonouchi
International conference 45th International Conference on Infrared Millimeter and Terahertz Waves ( Buffalo, NY, USA(Online) ) Poster (general)
2020.11 -
Impact of optical absorption for THz radiation in GaSb/InAs heterostructures
Ryota Ohashi, Daichi Shimada, Masatoshi Koyama, Toshihiko Maemoto, Shigehiko Sasa, Kosuke Okada, Hironaru Murakami, and Masayoshi Tonouchi
International conference 45th International Conference on Infrared Millimeter and Terahertz Waves ( Buffalo, NY, USA(online) ) Poster (general)
2020.11 -
R. Ohashi, D. Shimada, M. Koyama, T. Maemoto, and S. Sasa
International conference PACIFIC RIM MEETING ON ELECROCHEMICAL AND SOLID STATE SCIENCE 2020 (PRiME 2020) ( Hawaii, USA(Online) ) Poster (general)
2020.10 -
Solution-Processed Al-doped ZnO (AZO) Multilayer Thin-Film Transistors using Composition Controlled AZO Buffer toward Transparent Electronics
Kazuyori Oura, Keisuke Takano, Masatoshi Koyama, Toshihiko Maemoto and Shigehiko Sasa
International conference Materials Research Meeting 2019 ( 横浜 ) Poster (general)
2019.12 -
Characteristics of Gas Sensor Based on Molybdenum Disulfide/Graphene van der Waals Heterostructure
Shoji Maeda, Ryota Isu, Christopher J. Perini, Daiju Terasawa, Akira Fukda, Masatoshi Koyama, Akira Fujimoto, Yoshiyuki Harada, Kazuto Koike, Mitsuaki Yano, Eric M. Vogel
International conference MSR Fall Meeting 2019 ( Boston, USA ) Oral Presentation(general)
2019.12 -
Large-Area Chemically Synthesized Molybdenum Disulfide with Aqueous Thermolysis Method
Akira Fujimoto, Shoji Maeda, Ryota Isu, Kei-ichi Sakamoto, Kentaro Matano, Masatoshi Koyama, Yoshiyuki Harada, Kazuto Koike, Shigehiko Sasa, Mitsuaki Yano
International conference MSR Fall Meeting 2019 ( Boston, USA ) Oral Presentation(general)
2019.12 -
Characteristics of the Hf0.5Zr0.5O2 Thin Films Grown by a Chemical Solution Deposition Method
Mitsuaki Yano, Taichi Inoue, Sohji Ota, Yuichi Hirofuji, Masatoshi Koyama, Kazuto Koike
International conference European Material Research Society Fall Meeting ( Warshaw, Poland ) Poster (general)
2019.09 -
時間領域テラヘルツ分光を用いた高速原子ボンバードメント処理によるGaAsエピタキシャル層表面の評価
大椋祐斗, 竹内日出雄, 中山正昭, 小野田稜太, 中岡俊裕, 内海淳, 川崎繁男，小山政俊
Internal meeting 日本物理学会 2019年秋季大会 ( 岐阜大学 ) Oral Presentation(general)
2019.09 -
Terahertz Radiation Using GaSb/InAs Heterostructures excited by 1.55 um laser
Shigehiko Sasa, Daichi Shimada, Ryota Ohashi, Masatoshi Koyama, Toshihiko Maemoto, Iwao Kawayama and Masayoshi Tonouchi
International conference The 21th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures (EDISON 21) ( Nara, Japan ) Poster (general)
2019.07 -
The Thermal Stability of ε-Ga2O3 Thin Films Grown on (111) 3C-SiC Template Substrates
Masatoshi Koyama, Toyokazu Kaneko, Sodai Fujiwara, Toshihiko Maemoto and Shigehiko Sasa
International conference Compound Semiconductor Week 2019 Poster (general)
2019.05 -
酸化物半導体を用いたフレキシブル薄膜トランジスタの室温形成と曲げ耐性評価
熊谷敏広, 大浦紀頼， 小山政俊, 前元利彦, 佐々誠彦
Internal meeting 電気関係学会関西連合大会 Oral Presentation(general)
2018.12 -
Heteroepitaxial growth of ε-Ga2O3 thin films on (111) 3C-SiC templates by mist chemical vapor deposition
Toyokazu Kaneko, Sodai Fujiwara, Masatoshi Koyama, Toshihiko Maemoto and Shigehiko Sasa
International conference Transparent Conductive Materials 2018 ( Crete, Greece ) Poster (general)
2018.10 -
Enhanced Terahertz Radiation From GaSb/InAs Heterostructures
S. Sasa, M. Tatsumi, M. Koyama, T. Maemoto, I. Kawayama, and M. Tonouchi
International conference 43rd International Conference on Infrared Millimeter and Terahertz Waves ( Nagoya Congress Center ) Poster (general)
2018.09 -
GaSb/InAsヘテロ接合を用いたテラヘルツ波の放射強度増強の検討II
巽 雅史，木下耀平，小山政俊，前元利彦，佐々誠彦，寶田智哉，川山 巌，斗内政吉
Internal meeting 応用物理学会春季学術講演会 ( 早稲田大学 ) Oral Presentation(general)
2018.03 -
Bending Experiment and Resistance evaluation of Zinc Oxide Thin Films Grown on Cyclo Olefin Polymer Substrates
K. Oliver, K Nagayama, M. Koyama, T. Maemoto and S. Sasa
International conference 8th International Conference on Flexible and Printed Electronics 2017 ( Jeju island, Korea ) Poster (general)
2017.09 -
異種材料を積層させたグラフェンのラマン散乱と電気特性
藤元章，小山政俊，原田義之，小池一歩，佐々誠彦，矢野満明
Internal meeting 応用物理学会秋季学術講演会 ( 福岡国際会議場 ) Oral Presentation(general)
2017.09 -
フレキシブル基板上に形成した酸化物薄膜の曲げ耐性評価
永山幸希, 松田宗平, カルトシュタイン オリバー, 小山政俊, 前元利彦, 佐々誠彦
Internal meeting 日本真空学会 真空・表面科学合同講演会 ( 横浜国立大学 ) Oral Presentation(general)
2017.08-Now -
Study for Enhancement of Terahertz Radiation Using GaSb/InAs Heterostructures
Masatoshi Koyama, Yohei Kinoshita, Masashi Tatsumi, Toshihiko Maemoto, Shigehiko Sasa, Shota Hamauchi, Iwao Kawayama and Masayoshi Tonouchi
International conference The 20th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures (EDISON 20) ( Baffalo, NY, U.S.A. ) Poster (general)
2017.07 -
Effects of He plasma treatment on zinc oxide thin film transistors
Shotaro Shinya, Toyokazu Kaneko, Masatoshi Koyama, Toshihiko Maemoto and Shigehiko Sasa
Internal meeting The 2017 International Meeting for Future of Electron Devices, Kansai ( Kyoto ) Poster (general)
2017.06-Now -
Fabrication and characterization of fully transparent ZnO thin‐film transistors and self‐ switching nano‐diodes
Y. Sun, K. Ashida, S. Sasaki, M. Koyama, T. Maemoto, S. Sasa, S. Kasai, I. ??iguez‐de‐la‐Torre, and T. Gonz?lez
International conference EDISON 19 ( University of Salamance, Spain ) Poster (general)
2015.07 -
Fabrication and characterization of zinc oxide based self-switching nano-diode
S. Matsuda, K. Nagayama, K. Ashida, Y. Sun, M. Koyama, T. Maemoto, S. Sasa and S. Kasai
International conference International Workshop on ZnO and Related Materials ( National Taiwan University ) Poster (general)
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Fabrication and characterization of AZO multi-layer thin film transistors using AZO thin film buffers by soution method
F. Kimura, S. Sasaki, K. Oura, Y. Sun, M. Koyama, T. Maemoto and S. Sasa
International conference International Workshop on ZnO and Related Materials Poster (general)