Holographic image storage in polymer azobenzene liquid crystals

被引：5
|
作者：
Ikeda, T [1 ]
Yoneyama, S [1 ]
Yamamoto, T [1 ]
Hasegawa, M [1 ]
机构：
[1] Tokyo Inst Technol, Chem Resources Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan
来源：
MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2003年 / 401卷
关键词：
holographic image storage; photoinduced refractive-index modulation; azobenzene; polymer liquid crystals;
D O I：
10.1080/115421400390243165
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Unique characteristics were observed in phase-type gratings which were formed in polymer liquid crystal (PLC) films. We have investigated the formation and the properties of the holographic gratings recorded in PLCs with azobenzene moieties (photoresponsive unit). Two types of PLCs were examined: homopolymers of azobenzene monomers (PALC) and copolymers with a tolane moiety (mesogenic unit with a high birefringence) in the side chain. The diffraction efficiency (it) was enhanced in the LC phase. We obtained the value of eta of 31% while it was less than 1% in a glassy state in the Raman-Nath regime. This difference may be due to the modulation of refractive index (Deltan) based on alignment change of rnesogens in the PLC film. In addition, we attempted the holographic image storage of three-dimensional (3-D) objects in the PLC film. The 3-D object was reconstructed with high resolution (>5, 000 lines /mm).
引用
收藏
页码：149 / 159
页数：11
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