Zobrazeno 1 - 10
of 133
pro vyhledávání: '"Hirokazu Fukidome"'
Autor:
Koichi Tamura, Chao Tang, Daichi Ogiura, Kento Suwa, Hirokazu Fukidome, Yuma Takida, Hiroaki Minamide, Tetsuya Suemitsu, Taiichi Otsuji, Akira Satou
Publikováno v:
APL Photonics, Vol 7, Iss 12, Pp 126101-126101-10 (2022)
We designed and fabricated an epitaxial-graphene-channel field-effect transistor (EG-FET) featuring an asymmetric dual-grating-gate (ADGG) structure working as a current-driven terahertz detector and experimentally demonstrated a 10 ps-order fast res
Externí odkaz:
https://doaj.org/article/cac1ab75133a47f1921faa44ddc2e146
Autor:
Keiichi Omika, Yasunori Tateno, Tsuyoshi Kouchi, Tsutomu Komatani, Seiji Yaegassi, Keiichi Yui, Ken Nakata, Naoka Nagamura, Masato Kotsugi, Koji Horiba, Masaharu Oshima, Maki Suemitsu, Hirokazu Fukidome
Publikováno v:
Scientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
Abstract With the rapid depletion of communication-frequency resources, mainly due to the explosive spread of information communication devices for the internet of things, GaN-based high-frequency high-power transistors (GaN-HEMTs) have attracted con
Externí odkaz:
https://doaj.org/article/71a1bc3c36ce4b248bd1a5f7366d5a86
Autor:
Norifumi Endoh, Shoji Akiyama, Keiichiro Tashima, Kento Suwa, Takamasa Kamogawa, Roki Kohama, Kazutoshi Funakubo, Shigeru Konishi, Hiroshi Mogi, Minoru Kawahara, Makoto Kawai, Yoshihiro Kubota, Takuo Ohkochi, Masato Kotsugi, Koji Horiba, Hiroshi Kumigashira, Maki Suemitsu, Issei Watanabe, Hirokazu Fukidome
Publikováno v:
Nanomaterials, Vol 11, Iss 2, p 392 (2021)
Graphene is promising for next-generation devices. However, one of the primary challenges in realizing these devices is the scalable growth of high-quality few-layer graphene (FLG) on device-type wafers; it is difficult to do so while balancing both
Externí odkaz:
https://doaj.org/article/9add9d619f534c829c61b965e7a6216f
Autor:
Taiichi Otsuji, Stephane Albon Boubanga-Tombet, Akira Satou, Deepika Yadav, Hirokazu Fukidome, Takayuki Watanabe, Tetsuya Suemitsu, Alexander A. Dubinov, Vyacheslav V. Popov, Wojciech Knap, Valentin Kachorovskii, Koichi Narahara, Maxim Ryzhii, Vladimir Mitin, Michael S. Shur, Victor Ryzhii
Publikováno v:
Nanophotonics. 11:1677-1696
This paper reviews recent advances in the research and development of graphene-based plasmonic metamaterials for terahertz (THz) laser transistors. The authors’ theoretical discovery on THz laser transistors in 2007 was realized as a distributed-fe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d4b3d310b5a2226fefa362c6bedc1de
https://doi.org/10.1515/nanoph-2021-0651
https://doi.org/10.1515/nanoph-2021-0651
Autor:
Hirokazu Fukidome
Publikováno v:
Vacuum and Surface Science. 64:318-323
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63f2e082694cb407eca107ae0732085b
https://doi.org/10.1380/vss.64.318
https://doi.org/10.1380/vss.64.318
Publikováno v:
Conference on Lasers and Electro-Optics.
We introduce a new scheme of actively controlling the P T symmetry of the graphene Dirac plasmon metasurface in a graphene-channel laser transistor structure. Numerical simulation demonstrates the capability of 100-Gbit/s-class ultrafast gain-switchi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5a20be3043cc2a7291df19a15eb8d4b
https://doi.org/10.1364/cleo_at.2022.jth3b.10
https://doi.org/10.1364/cleo_at.2022.jth3b.10
Publikováno v:
Physical Review B. 104
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a52264c4c40ab7c4fe15a2c03d49b5a8
https://doi.org/10.1103/physrevb.104.l180202
https://doi.org/10.1103/physrevb.104.l180202
Autor:
Koichi Tamura, Daichi Ogiura, Kento Suwa, Yuma Takida, Hiroaki Minamide, Hirokazu Fukidome, Akira Satou, Taiichi Otsuji
Publikováno v:
2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz).
We report on fast, sensitive terahertz (THz) detection in an asymmetric dual-grating-gate graphene channel field-effect transistor (ADGG-GFET). Bias-dependent photoresponse is measured to clearly identify the plasmonic and photo-thermoelectric rectif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::022189849012c4aa11c2ce135ab6f928
https://doi.org/10.1109/irmmw-thz50926.2021.9567489
https://doi.org/10.1109/irmmw-thz50926.2021.9567489
Autor:
Yuma Takida, Koichi Tamura, Daichi Ogiura, Hiroaki Minamide, Akira Satou, Hirokazu Fukidome, Kento Suwa, Taiichi Otsuji
Publikováno v:
DRC
Terahertz (THz) electromagnetic waves hold great potentialities to be utilized for applications such as large-capacity, ultrahigh-speed wireless communications beyond 5G as well as non-destructive inspection of hazardous substances. Plasmonic THz dev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab23b6a7f63d5e41a69742340f9b0e90
https://doi.org/10.1109/drc52342.2021.9467191
https://doi.org/10.1109/drc52342.2021.9467191
Autor:
Maki Suemitsu, Kosuke Nagashio, Karsten Horn, Kazutoshi Funakubo, Keiichiro Tashima, Akira Toriumi, Naoka Nagamura, Koji Horiba, Masaharu Oshima, Hirokazu Fukidome, Takayuki Ide
Publikováno v:
Carbon
The linear band dispersion of graphene's bands near the Fermi level gives rise to its unique electronic properties, such as a giant carrier mobility, and this has triggered extensive research in applications, such as graphene field-effect transistors
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aea0eb426fa1af470098f1b7ba2deabe
https://doi.org/10.1016/j.carbon.2019.06.038
https://doi.org/10.1016/j.carbon.2019.06.038