Photoinduced birefringence and reversible optical storage in liquid-crystalline azobenzene side-chain polymers

Photoinduced birefringence and reversible optical storage in liquid-crystalline azobenzene side-chain polymers

A liquid crystal with an azobenzene moiety as a photoactive mesogenic unit is investigated in photoinduced birefringence. Measurements reveal that it possesses large magnitude of photoinduced birefringence (Δn∼10−2) and the characteristic of long-term optical storage. The resulting polarization info...

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Veröffentlicht in:Applied physics letters 1999-01, Vol.74 (1), p.19-21
Hauptverfasser: Wang, Changshun, Fei, Haosheng, Qiu, Yong, Yang, Yanqiang, Wei, Zhenqian, Tian, Yanqing, Chen, Yongmei, Zhao, Yingying
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container_issue 1
container_start_page 19
container_title Applied physics letters
container_volume 74
creator Wang, Changshun
Fei, Haosheng
Qiu, Yong
Yang, Yanqiang
Wei, Zhenqian
Tian, Yanqing
Chen, Yongmei
Zhao, Yingying
description A liquid crystal with an azobenzene moiety as a photoactive mesogenic unit is investigated in photoinduced birefringence. Measurements reveal that it possesses large magnitude of photoinduced birefringence (Δn∼10−2) and the characteristic of long-term optical storage. The resulting polarization information can be erased either by heating the sample to a temperature much higher than the glass transition temperature, or by optical method with a circularly polarized light. The mechanism of long-term optical storage is discussed in this letter.
doi_str_mv 10.1063/1.123138
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title Photoinduced birefringence and reversible optical storage in liquid-crystalline azobenzene side-chain polymers
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