Keiko Arimoto
Sumitomo Electric Industries
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Publication
Featured researches published by Keiko Arimoto.
Japanese Journal of Applied Physics | 2009
Hitoshi Sumiya; Katsuko Harano; Keiko Arimoto; Hiroyuki Kagi; Shoko Odake; Tetsuo Irifune
Optical properties of nano-polycrystalline diamond (NPD) synthesized by direct conversion from high-purity graphite under high pressure and temperature were investigated by infrared (IR), ultraviolet (UV), and photoluminescence (PL) spectroscopy. IR spectroscopy revealed that NPD has no large lattice strain and very few impurities, but possesses an absorption band attributed to a trace of hexagonal diamond. UV spectra displayed a continuous absorption wing due to structural defects and secondary absorption edge attributed to electron transitions from aggregated nitrogen. PL spectra exhibited peaks of N3 centers and broad bands related to dislocations.
Diamond and Related Materials | 2014
Hitoshi Sumiya; Yuh Ishida; Keiko Arimoto; Katsuko Harano
Archive | 2012
Kazuhiro Ikeda; Keiko Arimoto; Katsuko Yamamoto; Hitoshi Sumiya; Takeshi Sato
Archive | 2011
Hitoshi Sumiya; Katsuko Yamamoto; Takeshi Sato; Keiko Arimoto
Archive | 2012
Kazuhiro Ikeda; Keiko Arimoto; Katsuko Yamamoto; Hitoshi Sumiya
Diamond and Related Materials | 2016
Hitoshi Sumiya; Kazuhiro Ikeda; Keiko Arimoto; Katsuko Harano
Advanced Materials Research | 2014
Katsuko Harano; Keiko Arimoto; Yuh Ishida; Hitoshi Sumiya
Archive | 2016
Kazuhiro Ikeda; Keiko Arimoto; Katsuko Yamamoto; Hitoshi Sumiya; Takeshi Sato
Archive | 2011
Hitoshi Sumiya; Katsuko Yamamoto; Takeshi Sato; Keiko Arimoto
Archive | 2016
Kazuhiro Ikeda; Keiko Arimoto; Katsuko Yamamoto; Hitoshi Sumiya
