Tunable negative refraction in nematic liquid crystals

被引：29
|
作者：
Zhao, Qian
Kang, Lei
Li, Bo
Zhou, Ji [1 ]
Tang, Hong
Zhang, Baizhe
机构：
[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 22期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2399345
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A tunable negative refraction mechanism based on the properties of nematic liquid crystals is proposed. It shows that negative group refraction occurs at the interface between air and the nematic liquid crystals, and that the refraction can be adjusted by an applied electric field and by the temperature. For a nematic liquid crystal (E7, Merck), the group refraction is negative for the voltages of 1.0-2.8 V and reaches a maximum at 1.5 V. The negative group refraction decreases monotonously with increasing temperature. Such mechanism demonstrates the feasibility of tunable negative refraction devices based on liquid crystals.
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页数：3
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