Measurement of the photorefractive space-charge field in a ferroelectric mesogen

被引：5
|
作者：
Talarico, M [1 ]
Termine, R [1 ]
Barberio, G [1 ]
Pucci, D [1 ]
Ghedini, M [1 ]
Golemme, A [1 ]
机构：
[1] Univ Calabria, Dipartimento Chim, Unita INSTM, LASCAMM, I-87030 Arcavacata Di Rende, Italy
来源：
APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 07期
关键词：
D O I：
10.1063/1.1646762
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on the measurement of the photorefractive space-charge field in a chiral smectic C mesophase. The liquid crystal is intrinsically photoconducting and undoped. The space-charge field amplitude, obtained from a model connecting the induced refractive index modulation with the electric fields within the medium, is only 1% of the applied field. Nonetheless, high refractive index modulations Deltansimilar to10(-3) can be obtained because of the high spontaneous birefringence of the mesophase. The use of the standard models for inorganic crystalline photorefractive materials would have given a space-charge field amplitude two orders of magnitude higher. (C) 2004 American Institute of Physics.
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页码：1034 / 1036
页数：3
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