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

Changshun Wang, Haosheng Fei, Yong Qiu, Yanqiang Yang, Zhenqian Wei, Yanqing Tian, Yongmei Chen, Yingying Zhao

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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.

Original languageEnglish (US)
Pages (from-to)19-21
Number of pages3
JournalApplied Physics Letters
Issue number1
StatePublished - Dec 1 1999


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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