System of laser pump and synchrotron radiation probe microdiffraction to investigate optical recording process

Nobuhiro Yasuda, Yoshimitsu Fukuyama, Shigeru Kimura, Kiminori Ito, Yoshihito Tanaka, Hitoshi Osawa, Toshiyuki Matsunaga, Rie Kojima, Kazuya Hisada, Akio Tsuchino, Masahiro Birukawa, Noboru Yamada, Koji Sekiguchi, Kazuhiko Fujiie, Osamu Kawakubo, Masaki Takata

研究成果: Article査読

2 被引用数 (Scopus)

抄録

We have developed a system of laser-pump and synchrotron radiation probe microdiffraction to investigate the phase-change process on a nanosecond time scale of Ge2Sb2Te5 film embedded in multi-layer structures, which corresponds to real optical recording media. The measurements were achieved by combining (i) the pump-laser system with a pulse width of 300 ps, (ii) a highly brilliant focused microbeam with wide peak-energy width (ΔE/E ∼ 2%) made by focusing helical undulator radiation without monochromatization, and (iii) a precise sample rotation stage to make repetitive measurements. We successfully detected a very weak time-resolved diffraction signal by using this system from 100-nm-thick Ge2Sb 2Te5 phase-change layers. This enabled us to find the dependence of the crystal-amorphous phase change process of the Ge 2Sb2Te5 layers on laser power.

本文言語English
論文番号063902
ジャーナルReview of Scientific Instruments
84
6
DOI
出版ステータスPublished - 2013 6月
外部発表はい

ASJC Scopus subject areas

  • 器械工学

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