Refractive index change in photochromic diarylethene derivatives and its application to optical switching devices

被引:55
作者
Hoshino, M
Ebisawa, F
Yoshida, T
Sukegawa, K
机构
[1] NTT Opto-electronics Laboratories, Naka-gun, Ibaraki-ken, 319-11, Tokai-mura
关键词
refractive index change; photochromic; diarylethene derivatives; optical switching device;
D O I
10.1016/S1010-6030(97)00024-5
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The refractive index change of photochromic diarylethene derivatives in solid polymer was studied with a view to fabricating an optical switching device. The reaction time required for a symmetric diarylethene photochromic compound in a copolymer of fluoroethyl methacrylate and methyl methacrylate (film thickness: 10 mu m) was 20-30 s when exposed to UV light (intensity: 5.3 mW cm(-2) at 350 nm) to form a closed ring and about 10 s with visible light (intensity: 3.7 mW cm(-2) at 500 nm) to form an open ring. The refractive index change at 1.30 mu m, measured with a prism coupler, was 0.0005 per 10 wt.% of diarylethene photochromic compound. The iteration number of the photochromic reactions in the polymer film decreased in the following order: symmetric, asymmetric diarylethene and acid anhydride. We propose a new type of self-holding optical switch combining a heat stable photochromic material with silica planar lightwave circuits. (C) 1997 Elsevier Science S.A.
引用
收藏
页码:75 / 81
页数:7
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