1. Bias-dependent Photoabsorption Properties of GaN Porous Structures under Back-side Illumination. (18th September 2015) Authors: Sato, Taketomo; Kida, Hirofumi; Kumazaki, Yusuke; Yatabe, Zenji Journal: ECS transactions Issue: Volume 69:Number 2(2015) Page Start: 161 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. First demonstration of X-band AlGaN/GaN high electron mobility transistors using free-standing AlN substrate over 15 W mm−1 output power density. (18th March 2021) Authors: Ozaki, Shiro; Yaita, Junya; Yamada, Atsushi; Kumazaki, Yusuke; Minoura, Yuichi; Ohki, Toshihiro; Okamoto, Naoya; Nakamura, Norikazu; Kotani, Junji Journal: Applied physics express Issue: Volume 14:Number 4(2021) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
3. Formation of GaN porous structures with improved structural controllability by photoassisted electrochemical etching. (10th March 2016) Authors: Kumazaki, Yusuke; Yatabe, Zenji; Sato, Taketomo Journal: Japanese journal of applied physics Issue: Volume 55:Number 4(2016:Apr.)Supplement 4 Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
4. Formation of GaN-Porous Structures Using Photo-Assisted Electrochemical Process in Back-Side Illumination Mode. (14th March 2015) Authors: Watanabe, Akio; Kumazaki, Yusuke; Yatabe, Zenji; Sato, Taketomo Journal: ECS Electrochemistry Letters Issue: Volume 4:Number 5(2015) Page Start: H11 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
5. Formation of GaN-Porous Structures Using Photo-Assisted Electrochemical Process in Back-Side Illumination Mode. (1st January 2015) Authors: Watanabe, Akio; Kumazaki, Yusuke; Yatabe, Zenji; Sato, Taketomo Journal: ECS Electrochemistry Letters Issue: Volume 4:Number 5(2015) Page Start: H11 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
6. Improved fT/fmax in wide bias range by steam-annealed ultrathin-Al2O3 gate dielectrics for InP-based high-electron-mobility transistors. (1st April 2022) Authors: Ozaki, Shiro; Kumazaki, Yusuke; Okamoto, Naoya; Hara, Naoki; Ohki, Toshihiro Journal: Applied physics express Issue: Volume 15:Number 4(2022) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
7. Large photocurrents in GaN porous structures with a redshift of the photoabsorption edge. (1st October 2015) Authors: Sato, Taketomo; Kumazaki, Yusuke; Kida, Hirofumi; Watanabe, Akio; Yatabe, Zenji; Matsuda, Soichiro Journal: Semiconductor science and technology Issue: Volume 31:Number 1(2016:Jan.) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
8. Over 80% power-added-efficiency GaN high-electron-mobility transistors on free-standing GaN substrates. (29th December 2020) Authors: Kumazaki, Yusuke; Ohki, Toshihiro; Kotani, Junji; Ozaki, Shiro; Niida, Yoshitaka; Minoura, Yuichi; Nishimori, Masato; Okamoto, Naoya; Sato, Masaru; Nakamura, Norikazu; Watanabe, Keiji Journal: Applied physics express Issue: Volume 14:Number 1(2021) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
9. Precise Structural Control of GaN Porous Nanostructures Utilizing Anisotropic Electrochemical and Chemical Etching for the Optical and Photoelectrochemical Applications. Issue 7 (12th May 2017) Authors: Kumazaki, Yusuke; Matsumoto, Satoru; Sato, Taketomo Journal: Journal of the Electrochemical Society Issue: Volume 164:Issue 7(2017) Page Start: H477 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
10. Precise Structural Control of GaN Porous Nanostructures Utilizing Anisotropic Electrochemical and Chemical Etching for the Optical and Photoelectrochemical Applications. Issue 7 (1st January 2017) Authors: Kumazaki, Yusuke; Matsumoto, Satoru; Sato, Taketomo Journal: Journal of the Electrochemical Society Issue: Volume 164:Issue 7(2017) Page Start: H477 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗