Measuring nematic liquid crystal anchoring energy using whispering gallery modes

被引：2
|
作者：
Lee, Keon-Joo [1 ]
Kim, Sung-Jo [1 ]
Kang, Daeseung [2 ]
Kim, Jong-Hyun [1 ]
机构：
[1] Chungnam Natl Univ, Dept Phys, Daejeon, South Korea
[2] Soongsil Univ, Sch Elect Engn, Seoul, South Korea
来源：
OPTICS EXPRESS | 2015年 / 23卷 / 19期
基金：
新加坡国家研究基金会;
关键词：
All Open Access; Gold;
D O I：
10.1364/OE.23.024903
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Whispering gallery modes (WGMs) around the liquid crystal droplets are sensitive to the director orientation at the interface. An electric field was applied for changing the director orientation of a nematic liquid crystal droplet surrounded by polydimethylsiloxane (PDMS), which induced vertical director orientation at the interface. WGMs were shifted by varying the electric field intensity, and WGM shift-dependent director response was calculated. From this calculation we obtained the extrapolation length of 0.35 +/- 0.02 mu m. These results indicate that WGM sensitivity can be used for obtaining the surface properties of liquid crystals. (C) 2015 Optical Society of America
引用
收藏
页码：24903 / 24909
页数：7
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