Holographic grating by means of polymer liquid crystals

Tomiki Ikeda Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori‐ku, Yokohama, Japan Phone: +81 45–924–5240 Fax: +81 45–924–5240 E-mail: [email protected]

Satoshi Yoneyama Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori‐ku, Yokohama, Japan

Takahiro Yamamoto Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori‐ku, Yokohama, Japan

Makoto Hasegawa Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori‐ku, Yokohama, Japan

Abstract

Formation of intensity gratings was studied with two s‐polarized (s+s) configuration in polymer liquid crystals (PLCs) containing a photochromic moiety (azobenzene) and a mesogenic unit (tolane, T‐AB; cyanobiphenyl, CB‐AB) by photoinduced alignment of PLCs. Remarkable differences were observed between the two PLCs. T‐AB showed a faster response to the change in the diffraction intensity than CB‐AB. In T‐AB, alignment change took place faster than that of CB‐AB. By introducing the tolane unit at the side chain, we obtained a diffraction efficiency of 30 % in the Raman‐Nath regime

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Holographic grating by means of polymer liquid crystals

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Holographic grating by means of polymer liquid crystals

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