Dye-doped photorefractive liquid crystals for dynamic and storage holographic grating formation and spatial light modulation

被引：0
|
作者：
Khoo, IC [1 ]
Shih, MY
Wood, MV
Guenther, BD
Chen, PH
Simoni, F
Slussarenko, SS
Francescangeli, O
Lucchetti, L
机构：
[1] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA
[2] Univ Ancona, Dipartimento Sci Mat & Terra, I-60131 Ancona, Italy
[3] Ukrainian Acad Sci, Inst Phys, Kiev, Ukraine
来源：
PROCEEDINGS OF THE IEEE | 1999年 / 87卷 / 11期
关键词：
director axis; dye-doped liquid crystals; dynamic and storage holographic gratings; incoherent-coherent image conversion; nonlinear index change; optical limiting; photorefractivity; space charge fields;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The basic mechanisms of photo-induced space charge field formation, director axis I e-orientation, and refractive index changes in fullerene C60- and dye-doped nematic liquid crystals films are presented. In particular, in aligned methyl-red-doped nematic liquid crystal film, we observe a nonlinear index change coefficient as high as 10 cm2(/)W, associated with purely optically induced liquid crystal director axis re-orientation. Experimental observations of dynamic and high-resolution storage holographic grating formation, two beam coupling with gain of nearly 3000 cm(-1), optical limiting action at nanowatt cw laser power, and incoherent-coherent image conversion at mu W/cm(2) light intensity level are discussed.
引用
收藏
页码：1897 / 1911
页数：15
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