Hemi-omnidirectional Lasing from a Cholesteric Liquid Crystal Layer on a 1D Photonic Crystal Film

被引：2

作者：

Park, Byoungchoo ^{[1
]}

机构：

[1] Kwangwoon Univ, Dept Electrophys, Seoul 139701, South Korea

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2011年 / 59卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

Lasing; Cholesteric liquid crystals; Photonic crystals; Photonic bandgap materials; POLYMER NETWORK; LASER-EMISSION; BAND; COLOR; EDGE; DISPLAYS; DEFECT; LIGHT;

D O I：

10.3938/jkps.59.2246

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We herein report on a hybrid photonic band gap (PBG) system, which was fabricated using a cholesteric liquid crystal (CLC) layer on a 1-dimensional (1D) photonic crystal (PC) film, i.e., hybrid 'CLC/1D PC'. The CLC layer is made of nematic liquid crystal monomers embedded in polymeric helical CLC networks, thereby exhibiting a field-induced reorientational undulation of the helical axis. It is shown that intensity-controllable circularly polarized laser emissions may be generated at the wavelength of the high-energy band edge mode of the CLC layer in the dye-doped 'CLC/1D PC' PBG structure. The handedness of the lasing light corresponds to the handedness of the CLC layer used. Moreover, the direction of propagation of laser emissions could be manipulated from uni- to hemi-omnidirectional for the hybrid 'CLC/1D PC' PBG structure by applying an electric field.

引用

页码：2246 / 2251

页数：6

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