Tunable liquid-crystal microshell-laser based on whispering-gallery modes and photonic band-gap mode lasing

被引：19

作者：

Lu, Yuelan ^{[1
]}

Yang, Yue ^{[1
]}

Wang, Yan ^{[1
]}

Wang, Lei ^{[1
]}

Ma, Ji ^{[2
]}

Zhang, Lingli ^{[3
]}

Sun, Weimin ^{[1
]}

Liu, Yongjun ^{[1
]}

机构：

[1] Harbin Engn Univ, Minist Educ China, Key Lab Fiber Integrated Opt, Harbin 150001, Heilongjiang, Peoples R China

[2] Kent State Univ, Kent, OH 44240 USA

[3] Harbin Inst Technol, Dept Phys, Harbin 150001, Heilongjiang, Peoples R China

来源：

OPTICS EXPRESS | 2018年 / 26卷 / 03期

基金：

中国国家自然科学基金;

关键词：

REFRACTIVE-INDEXES; WAVE-GUIDE; MICRODROPLET; THRESHOLD;

D O I：

10.1364/OE.26.003277

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The lasing behaviors of dye-doped cholesteric liquid crystal (DDCLC) microshells fabricated with silica-glass-microsphere coated DDCLCs were examined. Lasing characteristics were studied in a carrier medium with different refractive indices. The lasing in spherical cholesteric liquid crystals (CLCs) was attributed to two mechanisms, photonic band-gap (PBG) lasing and whispering-gallery modes (WGMs), which can independently exist by varying the chiral agent concentration and pumping energy. It was also found that DDCLC microshells can function as highly sensitive thermal sensors, with a temperature sensitivity of 0.982 nm degrees C-1 in PBG modes and 0.156 nm degrees C-1 in WGMs. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：3277 / 3285

页数：9