Experimental verification of a tunable optical negative refraction in nematic liquid crystals

被引：15
|
作者：
Kang, Lei
Zhao, Qian
Li, Bo
Zhou, Ji [1 ]
Zhu, Hao
机构：
[1] Tsinghua Univ, State Key Lab New Ceram & Fine Proc, Dept Mat Sci & Engn, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Inst Optoelect Engn, Dept Precis Instruments & Mechanol, Beijing 100084, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 18期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Light refraction;
D O I：
10.1063/1.2736209
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The authors experimentally demonstrate a magnetically tunable optical negative refraction (NR) in nematic liquid crystals (NLCs), arising from the variation of optical anisotropy in the NLCs induced by external magnetic field. By measuring the refraction angle of the transmitted beam through the prism-shaped NLC device, the tunable extraordinary refractions for different molecular directions using magnetic field are observed. It shows that NR in NLCs occurs at certain inclination angle and can be tuned by changing the direction of the magnetic field, which is in good agreement with the established theory. (C) 2007 American Institute of Physics.
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页数：3
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