Zobrazeno 1 - 10
of 178
pro vyhledávání: '"Kensuke Oki"'
Publikováno v:
Materials Science in Semiconductor Processing. 148:106794
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62b90b3a95dd40e323ebfc9b55e82606
https://doi.org/10.1016/j.mssp.2022.106794
https://doi.org/10.1016/j.mssp.2022.106794
Analysis of LO phonon properties in III-nitrides: interaction with carriers and microscopic analysis
Autor:
Masaya Chizaki, Tomoya Nakayama, Yoshihiro Ishitani, Bei Ma, Hideto Miyake, Ken Morita, Shungo Okamoto, Bojin Lin, Kensuke Oki, Daisuke Iida, Kazuhiro Ohkawa
Publikováno v:
Gallium Nitride Materials and Devices XVI.
Longitudinal optical (LO) phonon has strong electric interaction with particles and fields. Particularly, the interaction in III-nitrides is more significant than that in conventional III-V materials. We show phonon-exciton interaction properties in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0914ab8699e3fe68d42ae7d483c6bf17
https://doi.org/10.1117/12.2576776
https://doi.org/10.1117/12.2576776
Publikováno v:
Journal of Luminescence. 243:118603
In ultraviolet light emission devices, excitons are a high-efficiency emission source. However, the mechanism of experimentally observed dependence of excitonic radiative lifetimes on temperature (T) has not been discovered. We present a numerical si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b99dec71e9ab3c0246a4e93493e0acd
https://doi.org/10.1016/j.jlumin.2021.118603
https://doi.org/10.1016/j.jlumin.2021.118603
Autor:
Bei Ma, Kensuke Oki, Kazuhiro Ohkawa, Yoshihiro Ishitani, Naomichi Saito, Shungo Okamoto, Ken Morita
Publikováno v:
2019 Compound Semiconductor Week (CSW).
Since heat generation in electronic devices induces the degradation of performance, the understanding of their thermal properties is required. InGaN and AlInN alloys are possibly the key materials for optical devices in green gap and high power trans
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::235f479d0ec1a99f3173c153bc206ae8
https://doi.org/10.1109/iciprm.2019.8819132
https://doi.org/10.1109/iciprm.2019.8819132
Autor:
Makoto Ichimura, M. Hirata, K. Ichimura, Yousuke Nakashima, Junko Kohagura, Mamoru Shoji, T. Shikama, Akira Tonegawa, Noriyasu Ohno, Shinji Nagata, Hirotaka Kubo, Tsuyoshi Kariya, H. Takeda, S. Takahashi, M. Iwamoto, Y. Hosoda, Yoshiki Hirooka, Ryuya Ikezoe, Yoshio Ueda, S. Kigure, Masayuki Yoshikawa, Nobuhiro Nishino, Suguru Masuzaki, Kensuke Oki, Isao Katanuma, M. Fukumoto, T. Numakura, Tsuyoshi Imai, Akiyoshi Hatayama, K. Hosoi, Hiroto Matsuura, Shinichiro Kado, Nobuyuki Asakura, Mizuki Sakamoto, Akio Sagara, R. Minami
Publikováno v:
Journal of Nuclear Materials. 463:537-540
This paper describes the results of the experiments performed on Tandem Mirror device GAMMA 10/PDX mainly using a new “divertor simulation experimental module (D-module)” installed on one of the end mirror exits which is specially designed to inv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2f99ff81b614193409d2faecf1ffca4e
https://doi.org/10.1016/j.jnucmat.2014.12.063
https://doi.org/10.1016/j.jnucmat.2014.12.063
Autor:
Ryuya Ikezoe, Kazuya Ichimura, M. Mizuguchi, S. Sumida, T. Yokoyama, R. Minami, M. Hirata, Yousuke Nakashima, Y. Iwamoto, Mizuki Sakamoto, T. Okada, Masayuki Yoshikawa, Kensuke Oki, Makoto Ichimura, S. Jang, K. Takeyama
Publikováno v:
Fusion Science and Technology. 68:136-141
In the GAMMA 10 tandem mirror, divertor simulation experiments that utilize particle flux toward the west end region (called end-loss flux) have been implemented. Since a positive correlation has b...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe35fa388a983113ec0fa0ab36f9c752
https://doi.org/10.13182/fst14-890
https://doi.org/10.13182/fst14-890
Autor:
Kensuke Oki, Y. Hosoda, M. Iwamoto, Mizuki Sakamoto, T. Imai, Yousuke Nakashima, Makoto Ichimura, K. Shimizu, Kazuya Ichimura, H. Takeda
Publikováno v:
Fusion Science and Technology. 68:130-135
In this paper, detailed results on spectral measurement are reported and the argument on impurity transport is presented from the comparison of the spectral measurements in the end-cell and the plu...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::97c11385603fd68e5230c5267f256fdb
https://doi.org/10.13182/fst14-881
https://doi.org/10.13182/fst14-881
Autor:
Yoriko Shima, Y. Nagayama, Tsuyoshi Imai, Mizuki Sakamoto, Xiaolong Wang, S. Kanno, Atsushi Mase, Kensuke Oki, Daisuke Kuwahara, Masayuki Yoshikawa, Junko Kohagura, Yousuke Nakashima, Makoto Ichimura
Publikováno v:
ResearcherID
In GAMMA 10/PDX, divertor simulation studies have been started as a new research plan by using end-loss plasma flux at the end-mirror region. A divertor simulation experimental module (D-module) was installed in the west end-cell. Here we introduce a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7752b9d6103915f53731fdea26e24be6
https://doi.org/10.13182/fst14-877
https://doi.org/10.13182/fst14-877
Autor:
Masayuki Yoshikawa, Xiaolong Wang, T. Numakura, Makoto Ichimura, Y. Hosoda, H. Takeda, K. Hosoi, K. Shimizu, Isao Katanuma, Mizuki Sakamoto, K. Ichimura, Tsuyoshi Imai, Yousuke Nakashima, Junko Kohagura, R. Minami, Tsuyoshi Kariya, Kensuke Oki, M. Hirata, M. Iwamoto, Ryuya Ikezoe
Publikováno v:
Fusion Science and Technology. 68:28-35
This paper describes the recent results of divertor simulation research toward the realization of the detached plasma using the end-mirror of a large tandem mirror device. The additional ion cyclotron range of frequency heating in the anchor-cells fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e3966a19a7904c53c6114e26e524627
https://doi.org/10.13182/fst14-882
https://doi.org/10.13182/fst14-882
Publikováno v:
Physical Review B. 96
Population distributions and transition fluxes of the $A$ exciton in bulk GaN are theoretically analyzed using rate equations of states of the principal quantum number $n$ up to 5 and the continuum. These rate equations consist of the terms of radiat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34a6fadb6ed147e5124937de73446006
https://doi.org/10.1103/physrevb.96.205204
https://doi.org/10.1103/physrevb.96.205204