Nonlinear refractive indices of polydiacetylene microcrystals

Hiro Matsuda, Shinji Yamada, Edward R. Van Keuren, Hideyuki Katagi, Hitoshi Kasai, Shuji Okada, Hidetoshi Oikawa, Hachiro Nakanishi, Euan C. Smith, Ajoy K. Kar, Brian S. Wherrett

    研究成果: Conference article査読

    23 被引用数 (Scopus)


    Polydiacetylene microcrystals in a water suspension or a polymer matrix were prepared by a simple precipitation procedure in order to obtain a thin samples with good optical quality maintaining the characteristics of crystalline materials. The nonlinear refraction, n2, and nonlinear absorption, β, around the exciton peak were measured by z-scan method using a tunable picosecond laser. The signs of the n2 are positive/negative at wavelengths shorter/longer than the exciton peak and strong saturable absorption, which β is negative, are observed around the peak. The largest n2 was obtained to be plus 0.024 cm2/GW (Re χ (3) = +1.4 × 10-9 esu) at 640 nm for a gelatin composite film containing 24 wt percent of polydiacetylene microcrystals.

    ジャーナルProceedings of SPIE - The International Society for Optical Engineering
    出版ステータスPublished - 1997
    イベントPhotosensitive Optical Materials and Devices - San Jose, CA, United States
    継続期間: 1997 2 121997 2 12

    ASJC Scopus subject areas

    • 電子材料、光学材料、および磁性材料
    • 凝縮系物理学
    • コンピュータ サイエンスの応用
    • 応用数学
    • 電子工学および電気工学


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