Effect of crystal defects on laser-induced-damage tolerance of organic crystal, 4-dimethylamino-N-methyl-4-stilbazolium tosylate

Yoshinori Takahashi, Kazumasa Sugiyama, Srinivasan Brahadeeswaran, Shinji Onzuka, Tomosumi Kamimura, Masashi Yoshimura, Yusuke Mori, Kunio Yoshida, Takatomo Sasaki

研究成果: Article査読

11 被引用数 (Scopus)

抄録

We investigated various defects of the organic 4-dimethylamino-N-methyl-4- stilbazolium tosylate (DAST) crystal to improve its laser-induced-damage tolerance for high-power terahertz (THz) application. We used DAST crystals grown by the slow-cooling method in methanol solution, and an irradiated infrared laser with a wavelength of 1550 nm without DAST absorption. It was found that laser damage was easily caused by crystal defects such as a rough surface, twin boundaries, and narrow-line defects (NLDs) in the bulk. In particular, NLDs are a serious problem that degrade the bulk laser-induced-damage tolerance of DAST crystals. The DAST crystals without such defects have high laser-induced-damage tolerance. To suppress the formation of crystal defects, we modified the crystal-growth conditions, and succeeded in growing PAST crystals with fewer defects than crystals obtained by the conventional growth process.

本文言語English
ページ(範囲)318-323
ページ数6
ジャーナルJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
46
1
DOI
出版ステータスPublished - 2007 1月 10
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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