Holographic gratings and holographic image storage via photochemical phase transitions of polymer azobenzene liquid-crystal films

被引：78

作者：

Yamamoto, T ^{[1
]}

Hasegawa, M ^{[1
]}

Kanazawa, A ^{[1
]}

Shiono, T ^{[1
]}

Ikeda, T ^{[1
]}

机构：

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

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2000年 / 10卷 / 02期

关键词：

D O I：

10.1039/a905501k

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：

Phase-type gratings formed by photochemical phase transitions of a polymer azobenzene liquid crystal have been characterized. The sensitivity of the material was improved by a factor of 23 in the liquid-crystalline phase owing to effective induction of the photochemical phase transition in the bright fringes of the interference pattern. A mechanism for grating formation in films based on dynamics both in grating formation and for the photochemical phase transition has been proposed. Observation of the grating structure with a polarizing optical microscope confirmed that the isotropic phase induced photochemically was arranged at well defined separations. The polymer azobenzene liquid crystal showed a storage capability of > 100 Mbits cm(-2) which corresponds to a resolution of < 1 mu m and a spatial frequency of > 1000 lines mm(-1). We also attempted holographic image storage using a photomask as an object.

引用

页码：337 / 342

页数：6

共 31 条

[1] Holographic gratings in azobenzene side-chain polymethacrylates [J].