Zobrazeno 1 - 10 of 23 pro vyhledávání: '"Takaharu Tashiro"'
1
High-power AlGaN UVC LEDs using PhC reflector p-contact layers
Autor: Takaharu Tashiro, Tsugumu Nagano, Y. Kurashima, Yukio Kashima, Masafumi Jo, Hideki Takagi, Mitsunori Kokubo, Yasushi Iwaisako, Takeshi Iwai, Tamato Osada, Eriko Matsuura, Ryuichiro Kamimura, Noritoshi Maeda, Hideki Hirayama, Kanji Furuta
Publikováno v: Gallium Nitride Materials and Devices XVI.
We demonstrated an enhancement of light-extraction efficiency (LEE) in an AlGaN UVC light-emitting diode (LED) using photonic-crystal (PhC)-reflector fabricated on a p-GaN contact layer, which was introduced to realize both of low resistivity and hig
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::72ead733c13be18de6dc9b216b53f598
https://doi.org/10.1117/12.2579591
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2
LEE enhancement in AlGaN UVC LED using photonic crystal reflector fabricated on p-GaN contact layer (Conference Presentation)
Autor: Tsugumu Nagano, Masafumi Jo, Yukio Kashima, Y. Kurashima, Takeshi Iwai, Hideki Takagi, Eriko Matsuura, Tamato Osada, Hideki Hirayama, Takaharu Tashiro, Mitsunori Kokubo, Ryuichiro Kamimura, Noritoshi Maeda, Kanji Furuta, Yasuhiro Watanabe, Yasushi Iwaisako, Tomohiko Shibata
Publikováno v: Gallium Nitride Materials and Devices XIV.
AlGaN UV-C light-emitting diodes (LEDs) are attracting a great deal of attentions for applications of sterilization, water purification, in the medical fields, and so on. The increase in wall-plug efficiency (WPE) is a recent main subject for an AlGa
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::60c43762918845d36d195c64e27256f4
https://doi.org/10.1117/12.2505751
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4
Rashba-Edelstein Magnetoresistance in Metallic Heterostructures
Autor: Kazuya Ando, Satoshi Haku, Hongyu An, Takaharu Tashiro, Akiyo Nomura, Hiroyasu Nakayama, Yusuke Kanno
Publikováno v: Physical Review Letters. 117
We report the observation of magnetoresistance originating from Rashba spin-orbit coupling (SOC) in a metallic heterostructure: the Rashba-Edelstein (RE) magnetoresistance. We show that the simultaneous action of the direct and inverse RE effects in
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dffb52790a44090a636ed38e61ec8d65
https://doi.org/10.1103/physrevlett.117.116602
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7
Spin-current emission governed by nonlinear spin dynamics
Autor: Akiyo Nomura, Kazuya Ando, Shun Watanabe, Keehoon Kang, Saki Matsuura, Henning Sirringhaus, Takaharu Tashiro
Publikováno v: Scientific Reports
Coupling between conduction electrons and localized magnetization is responsible for a variety of phenomena in spintronic devices. This coupling enables to generate spin currents from dynamical magnetization. Due to the nonlinearity of magnetization
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ff3e208430b68fdb47022bc66ff77a2
https://doi.org/10.1038/srep15158
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8
Absorption of Diffusive Spin Current in Surface and Bulk States of a Topological Insulator
Autor: Takaharu Tashiro, Akiyo Nomura, Takao Sasagawa, Kazuya Ando, Nariaki Nasaka
Publikováno v: Phys. Rev. B. 96:214440
We report the absorption of a diffusive spin current in a bulk-carrier compensated topological insulator: ${\mathrm{Sn}}_{0.02}\ensuremath{-}{\mathrm{Bi}}_{1.08}{\mathrm{Sb}}_{0.9}{\mathrm{Te}}_{2}\mathrm{S}$ (Sn-BSTS). By injecting spins into a Sn-B
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9624d5afac2db66292f8c4f898241480
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100759381
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9
High external quantum efficiency (10%) AlGaN-based deep-ultraviolet light-emitting diodes achieved by using highly reflective photonic crystal on p-AlGaN contact layer
Autor: Mitsunori Kokubo, Masafumi Jo, Hideki Takagi, Takeshi Iwai, Yukio Kashima, Noritoshi Maeda, Hideki Hirayama, Ryuichiro Kamimura, Yamato Osada, Eriko Matsuura, Toshiro Morita, Takaharu Tashiro
Publikováno v: Applied Physics Express. 11:012101
We increased the light-extraction efficiency (LEE) of AlGaN-based deep-ultraviolet light-emitting diodes (DUV LEDs) by introducing a highly reflective photonic crystal (HR-PhC) into the surface of the p-AlGaN contact layer, thereby achieving a high e
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9ff3b8d842906d44c9ae911de3aaacd1
https://doi.org/10.7567/apex.11.012101
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10
Three-magnon splitting controlled by temperature
Autor: Saki Matsuura, Kazuya Ando, Takaharu Tashiro
Publikováno v: SPIE Proceedings.
A nonlinear magnon interaction has been investigated in an yttrium iron garnet/Pt film. In the bilayer film, multiple microwave absorption signals due to the excitation of magnetostatic spin waves, including magnoetostatic surface waves and backward
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1d7fe7a2b04476f8dd9e36a16c020c17
https://doi.org/10.1117/12.2059892
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