Ju Yoon Hnin Bo, Heishun Zen, Kyohei Yoshida, Kan Hachiya, Rei Akasegawa, Hideaki Ohgaki. Observation of Selective Excitation of Raman Inactive Phonon Mode of Strontium Titanate Through Anti-Stokes Hyper-Raman Scattering Process. Journal of Infrared, Millimeter, and Terahertz Waves. 2024
Keisuke Sota, Kota Ando, Heishun Zen, Toshiteru Kii, Hideaki Ohgaki, Takashi Nakajima. Morphological study of depth-controlled high quality holes and lines fabricated on a metal substrate with a thin metal film by picosecond laser pulses. Optics & Laser Technology. 2024. 175. 110853-110853
Keigo Kawase, Heishun Zen, Takeshi Sakai, Yasushi Hayakawa, Hideaki Ohgaki, Ryoichi Hajima. Beam characterization of mid-infrared free electron laser to drive high-harmonic generation. Japanese Journal of Applied Physics. 2024. 63. 7. 072001-072001
Ryoichi Hajima, Keigo Kawase, James Koga, Heishun Zen, Hideaki Ohgaki. Breakdown of argon by a train of high-repetition long-wave-infrared pulses from a free-electron laser oscillator. Optics Express. 2024
R Hajima, K Kawase, H Zen, H Ohgaki. Carrier-envelope phase stabilization in FEL oscillators. Journal of Physics: Conference Series. 2024. 2687. 3. 032013-032013
Ryoichi Hajima, Ryoji Nagai, Keigo Kawase, Hideaki Ohgaki, Heishun Zen, Yasushi Hayakawa, Takeshi Sakai, Yoske Sumitomo, Miho Shimada, Tsukasa Miyajima. Research and Development of Attosecond VUV and X-ray Sources Driven by Mid-Infrared FEL Oscillators. OSA High-brightness Sources and Light-driven Interactions Congress 2020 (EUVXRAY, HILAS, MICS). 2020. EF1A.4
RE Implementation: Study on Rural Electrification in ASEAN
(The 8th JASTIP-WP2 Annual Workshop 2023)
Flat Laser Compton Gamma-ray Beam Generation in UVSOR
(15th Eco-Energy and Materials Science and Engineering Symposium 2022)
Panel Discussion: Electronics and Automotive
(Cambodia Tech Expo 2022 2022)
Environment-friendly water treatment by fine bubbles
(COP27 Japan Pavilion Seminar 2022)
Few cycle pulse generation from a high effciency free-electron laser oscillator operated in superradiance regime
(11th International Workshop on Infrared Microscopy and Spectroscopy with Accelerator Based Sources 2022)
資源エネルギー学会
, 研究・イノベーション学会
, 日本加速器学会
, 日本放射光学会
, 日本原子力学会
, 日本物理学会
, Japan Accelerator Society
, Japan Synchrotron Radiation Scoiety
, Japan Atomic Energy Society
, Japan Physical Society
, 日本赤外線学会
, IEEE