Výsledky vyhledávání - "Kunio Okimura"

Dynamic inversion of planar-chiral response of terahertz metasurface based on critical transition of checkerboard structures

Autor: Yoshiro Urade, Kai Fukawa, Fumiaki Miyamaru, Kunio Okimura, Toshihiro Nakanishi, Yosuke Nakata

Publikováno v: Nanophotonics. 11(9):2057-2064

Dynamic inversion of the planar-chiral responses of a metasurface is experimentally demonstrated in the terahertz regime. To realize this inversion, the critical transition of the checkerboard-like metallic structures is used. Resonant structures wit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0bb7ce699bb4faea986af60e073a967e
http://hdl.handle.net/2433/277280

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Dynamic quarter-wave metasurface for efficient helicity inversion of polarization beyond the single-layer conversion limit

Autor: Kunio Okimura, Yosuke Nakata, Atsushi Sanada, Mitsuki Kobachi, Fumiaki Miyamaru, Toshihiro Nakanishi

Terahertz chiral sensing and polarization-multiplexing communication demand subwavelength devices that dynamically invert polarization helicity. Metasurfaces can enhance anisotropy and fine tunability at subwavelength scales for this purpose. Althoug

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95f950ed2334c80980d302dd721b3c76
http://arxiv.org/abs/2106.12932

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Electrochemical Probing of H2O2 Using TiO2-ZrO2-HfO2 Modified Glassy Carbon Electrode: A Promoted Sacrificial Behavior of Hf4+ ions

Autor: Parthasarathy Srinivasan, John Bosco Balaguru Rayappan, Rio Kita, Kunio Okimura, Kazuyoshi Tsuchiya, Akshay Krishnakumar, Ganesh Kumar Mani

Publikováno v: Water, Air, & Soil Pollution. 232

In recent years, there is a massive demand for the development of high-performance sensing technologies to curtail the effect of environmental pollutions. One such primary ecological concern is water pollution, where the major risk factor is associat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7b831ac821ff33837a6ea11245514ae5
https://doi.org/10.1007/s11270-021-05190-4

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Infrared-light switching in highly oriented VO2 films on ZnO-buffered glasses with controlled phase transition temperatures

Autor: Tetsuo Tsuchiya, Hiroaki Hoshino, Iwao Yamaguchi, Kunio Okimura

Publikováno v: Solar Energy Materials and Solar Cells. 191:9-14

Switching ability for infrared-light (IR) of commercial glass is of great interest for realizing practical smart windows which enable energy savings. In this article, we report on highly oriented growth of vanadium dioxide (VO2) films on ZnO-buffered

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2b1089a960283f2fa501fb862153e8f7
https://doi.org/10.1016/j.solmat.2018.10.022

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VO2 films on flexible thin polyimide films: Fabrication and characterization of electrical and optical properties in insulator-metal transition

Autor: Yuta Miyatake, Yukito Ozawa, Kunio Okimura, Toshihiro Nakanishi

Publikováno v: Journal of Vacuum Science & Technology A. 40:043406

We report on the realization of thin polyimide films on which phase transition vanadium dioxide (VO2) films grow. Biased reactive sputtering achieved b-axis-oriented growth of VO2 films on ZnO-buffered polyimide films with a thickness of 8.5 μm. By

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::beedcabc3078c971f4044015b8877738
https://doi.org/10.1116/6.0001808

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Approaching ultrathin VO2films on sapphire (001) substrates by biased reactive sputtering: Characteristic morphology and its effect on the infrared-light switching

Autor: Yoichi Uehara, Kunio Okimura, Mustapha Zaghrioui, Masashi Kuwahara, Joe Sakai

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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Ultrathin VO2 films with insulator-metal transition (IMT) were successfully fabricated on sapphire (001) substrates by utilizing radio frequency-biased reactive sputtering. We realized a 6 nm-thick VO2 film that shows resistance change over 2 orders

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9fd10eb4499a5edfe2e09f43f0d7397e
http://hdl.handle.net/10261/264197

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