Novel Nondestructive Readout Methods For Near-field Optical Recording with Large Refractive Index Modulation in Amorphous Diarylethene Layer

  • Maruyama Hideki
    Research and Development Laboratory, Panasonic Communications Co., Ltd.
  • Kawai Tsuyoshi
    Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University
  • Kim Myeong-Suk
    Fukuoka Industry Science and Technology Foundation, Fukuoka-IST
  • Irie Masahiro
    Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University

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Abstract

Novel nondestructive readout methods for near-field optical recording has been demonstrated with an amorphous photochromic film. Large refractive index change of an amorphous photochromic layer of 1,2-bis(5-(2,4-diphenylphenyl)-2,4-dimethyl-3-thienyl) perfluorocyclopentene induced by the photochromic reactions is detected by the use of a guided-wave mode and a substrate radiation mode with near-IR laser light. The modulation amplitude in the reflected light intensity before and after the photo-bleaching reaction was as high as 20%.

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