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

页码：24903 / 24909

页数：7

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