Azobenzene liquid-crystalline polymer for optical switching of grating waveguide couplers with a flat surface

被引：32

作者：

Bang, Chong-Uk ^{[1
]}

Shishido, Atsushi ^{[1
]}

Ikeda, Tomiki ^{[1
]}

机构：

[1] Tokyo Inst Technol, Chem Resources Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2007年 / 28卷 / 09期

关键词：

azo polymer; grating; holography; liquid-crystalline polymer (LCP); optical switching;

D O I：

10.1002/marc.200700041

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Grating waveguide couplers with a flat surface were fabricated in an azobenzene liquid-crystalline polymer film by holographic lithography using Ar+ laser beams at 488 nm. When a probe beam at 633 nm was incident to one grating of a grating waveguide coupler, the beam propagated in the waveguide and an output beam came out from the other grating with the throughput coupling efficiency of approximate to 5%. Upon irradiation of the film between two gratings with UV light to cause trans-cis photoisomerization of the azobenzene moiety, the intensity of the output beam was repeatedly switched. It was found that the alternating irradiation at 366 and 436 nm induced reversible changes in the intensity of the guided probe beam.

引用

页码：1040 / 1044

页数：5

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