Photoinduced birefringence and reversible optical storage in liquid-crystalline azobenzene side-chain polymers
- 4 January 1999
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 74 (1), 19-21
- https://doi.org/10.1063/1.123138
Abstract
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.Keywords
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