Hideki Hirayama - Publications, H-index & Citations

Hideki Hirayama

pioneering research institute riken

43H指数

492论文数

8.8K被引数

收录论文 46

发表时间

Synergistic TE-mode Engineering and Polarization Control in 290 nm AlGaN UVB LEDs via Al-Graded Hole Injection Layer 通过Al梯度空穴注入层实现的协同TE模式工程和偏振控制在290 nm AlGaN UVB LED中的应用

Micro and Nanostructures

IF3

2025-11-26

PREAI

Hafeez Ur Rahman; Muhammad Nawaz Sharif; Khalid Ayub; M.Ajmal Khan; Hideki Hirayama; Fang. Wang; Yuhuai. Liu

Enhancing 229 nm far-UVC LED Efficiency via Simultaneous Polarization Engineering in n-AlGaN and p-AlGaN Injection Layers 通过同时优化n-AlGaN和p-AlGaN注入层的极化工程提升229 nm远UVC LED效率

Micro and Nanostructures

IF3

2025-10-02

PREAI

Khalid Ayub; Banaras Khan; M. Nawaz Sharif; Hafeez ur Rahaman; M. Ajmal Khan; Hideki Hirayama; Fang Wang; Yuhuai Liu

M-plane GaN terahertz quantum cascade laser structure design and doping effect for resonant-phonon and phonon-scattering-injection schemes

SCIENTIFIC REPORTS

IF3.9

2023-07-14

OAAI

Ye, Fan; Wang, Yiyang; Wang, Li; Lin, Tsung-Tse; Zeng, Fantai; Ji, Yue; Zhang, Jinchuan; Liu, Fengqi; Hirayama, Hideki; Wang, Ke; Shi, Yi; Zheng, Youdou; Zhang, Rong

Clean three-level direct-phonon injection terahertz quantum cascade laser

APPLIED PHYSICS LETTERS

IF3.6

2023-06-01

PREAI

Wang, Li; Lin, Tsung-Tse; Wang, Ke; Hirayama, Hideki

Investigation of V/III ratio dependencies for optimizing AlN growth during reduced parasitic reaction in metalorganic vapor phase epitaxy

SCIENTIFIC REPORTS

IF3.9

2023-02-27

OAAI

Tomita, Atsushi; Miyagawa, Takumi; Hirayama, Hideki; Takashima, Yuusuke; Naoi, Yoshiki; Nagamatsu, Kentaro

High growth temperature for AlN by jet stream gas flow metalorganic vapor phase epitaxy

SCIENTIFIC REPORTS

IF3.9

2023-02-10

OAAI

Nagamatsu, Kentaro; Miyagawa, Takumi; Tomita, Atsushi; Hirayama, Hideki; Takashima, Yuusuke; Naoi, Yoshiki

Optical gain reduction caused by nonrelevant subbands in narrow-period terahertz quantum cascade laser designs

SCIENTIFIC REPORTS

IF3.9

2022-12-23

OAAI

Wang, Li; Lin, Tsung-Tse; Wang, Ke; Hirayama, Hideki

Realizing high injection current density up to 200 kA-cm-2 in electrically pumped AlGaN ultraviolet laser diodes on c-Sapphire substrate

OPTICAL MATERIALS

IF4.2

2022-11-01

PREAI

Khan, M. Ajmal; Itokazu, Yuri; Maeda, Noritoshi; Jo, Masafumi; Hirayama, Hideki

Nonrelevant quantum levels effecting on the current in 2-well terahertz quantum cascade lasers

SCIENTIFIC REPORTS

IF3.9

2022-10-17

OAAI

Wang, Li; Lin, Tsung-Tse; Wang, Ke; Hirayama, Hideki

Step-flow growth of Al droplet free AlN epilayers grown by plasma assisted molecular beam epitaxy

JOURNAL OF PHYSICS D-APPLIED PHYSICS

IF3.2

2022-06-29

PREAI

Shao, Pengfei; Li, Siqi; Li, Zhenhua; Zhou, Hui; Zhang, Dongqi; Tao, Tao; Yan, Yu; Xie, Zili; Wang, Ke; Chen, Dunjun; Liu, Bin; Zheng, Youdou; Zhang, Rong; Lin, Tsungtse; Wang, Li; Hirayama, Hideki

Milliwatt-power far-UVC AlGaN LEDs on sapphire substrates

APPLIED PHYSICS LETTERS

IF3.6

2022-05-25

PREAI

Jo, Masafumi; Itokazu, Yuri; Hirayama, Hideki

Reduction of parasitic reaction in high-temperature AlN growth by jet stream gas flow metal-organic vapor phase epitaxy

SCIENTIFIC REPORTS

IF3.9

2022-05-10

OAAI

Nagamatsu, Kentaro; Tsuda, Shota; Miyagawa, Takumi; Aono, Reiya; Hirayama, Hideki; Takashima, Yuusuke; Naoi, Yoshiki

Achieving 9.6% efficiency in 304 nm p-AlGaN UVB LED via increasing the holes injection and light reflectance

SCIENTIFIC REPORTS

IF3.9

2022-02-16

OAAI

Khan, M. Ajmal; Maeda, Noritoshi; Yun, Joosun; Jo, Masafumi; Yamada, Yoichi; Hirayama, Hideki

Leakages suppression by isolating the desired quantum levels for high-temperature terahertz quantum cascade lasers

SCIENTIFIC REPORTS

IF3.9

2021-12-08

OAAI

Wang, Li; Lin, Tsung-Tse; Chen, Mingxi; Wang, Ke; Hirayama, Hideki

Polarization-dependent hole generation in 222 nm-band AlGaN-based Far-UVC LED: a way forward to the epi-growers of MBE and MOCVD

JOURNAL OF MATERIALS CHEMISTRY C

IF5.1

2021-01-01

PREAI

Malik, Shahzeb; Usman, Muhammad; Khan, M. Ajmal; Hirayama, Hideki

High-Efficiency and High-Reliability Deep-UV Light-Emitting Diodes Using Transparent Ni-Implanted AlN Ohmic Electrodes

IEEE ACCESS

IF3.6

2021-01-01

OAAI

Park, Tae Hoon; Son, Kyung Rock; Hirayama, Hideki; Kim, Tae Geun

High internal quantum efficiency and optically pumped stimulated emission in AlGaN-based UV-C multiple quantum wells

APPLIED PHYSICS LETTERS

IF3.6

2020-10-20

PREAI

Murotani, Hideaki; Tanabe, Ryohei; Hisanaga, Keisuke; Hamada, Akira; Beppu, Kanta; Maeda, Noritoshi; Khan, M. Ajmal; Jo, Masafumi; Hirayama, Hideki; Yamada, Yoichi

The 2020 UV emitter roadmap

JOURNAL OF PHYSICS D-APPLIED PHYSICS

IF3.2

2020-09-16

393

OAAI

Amano, Hiroshi; Collazo, Ramon; Santi, Carlo De; Einfeldt, Sven; Funato, Mitsuru; Glaab, Johannes; Hagedorn, Sylvia; Hirano, Akira; Hirayama, Hideki; Ishii, Ryota; Kashima, Yukio; Kawakami, Yoichi; Kirste, Ronny; Kneissl, Michael; Martin, Robert; Mehnke, Frank; Meneghini, Matteo; Ougazzaden, Abdallah; Parbrook, Peter J.; Rajan, Siddharth; Reddy, Pramod; Roemer, Friedhard; Ruschel, Jan; Sarkar, Biplab; Scholz, Ferdinand; Schowalter, Leo J.; Shields, Philip; Sitar, Zlatko; Sulmoni, Luca; Wang, Tao; Wernicke, Tim; Weyers, Markus; Witzigmann, Bernd; Wu, Yuh-Renn; Wunderer, Thomas; Zhang, Yuewei

Temperature dependence of nonradiative recombination processes in UV-B AlGaN quantum well revealed by below-gap excitation light 间隙以下激发光揭示的uv-b AlGaN量子阱中非辐射复合过程的温度依赖性

OPTICAL MATERIALS

IF4.2

2020-07-01

PREAI

Hossain, M. Ismail; Itokazu, Yuri; Kuwaba, Shunsuke; Kamata, Norihiko; Hirayama, Hideki

External Quantum Efficiency of 6.5% at 300 nm Emission and 4.7% at 310 nm Emission on Bare Wafer of AlGaN-Based UVB LEDs

ACS APPLIED ELECTRONIC MATERIALS

IF4.7

2020-06-06

PREAI

Khan, M. Ajmal; Itokazu, Yuri; Maeda, Noritoshi; Jo, Masafumi; Yamada, Yoichi; Hirayama, Hideki

研究方向