PDa01 高屈折率異方性を有するトラン液晶の分子配向制御による位相格子形成

概要

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This study describes formation of grating in polymer liquid crystals (PLCs) containing photochromic moiety (azobenzene) and mesogenic unit (tolane or cyanobiphenyl) by means of photoinduced alignment. A remarkable difference was observed between two PLCs containing tolane or cyanobiphenyl unit as a mesogen. The tolane sample showed a faster response for change in the diffraction intensity than PLC containing a cyanobiphenyl unit. To explore the mechanism of the grating formation in more detail, we investigated the photoinduced alignment behavior of the PLCS. In the PLC containing a tolane unit, alignment change took place faster than that of the cyanobiphenyl sample. These results can be explained in terms of mobility of the tolane moiety. By introduction of the tolane unit at the side-chain, diffraction efficiency of about 25% was achieved.
日本液晶学会の論文
1999-09-28