Polarization characteristics of phase retardation defect mode lasing in polymeric cholesteric liquid crystals

被引：25

作者：

Song, MH

Shin, KC

Park, B

Takanishi, Y

Ishikawa, K

Watanabe, J

Nishimura, S

Toyooka, T

Zhu, ZG

Swager, TM

Takezoe, H ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 1528552, Japan

[2] Nippon Oil Corp, Cent Tech Res Lab, Naka Ku, Yokohama, Kanagawa 2310815, Japan

[3] MIT, Dept Chem, Cambridge, MA 02139 USA

来源：

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS | 2004年 / 5卷 / 04期

基金：

日本学术振兴会; 美国国家科学基金会;

关键词：

photonic band gap; polymer cholesteric liquid crystal; defect mode; lasing; phase retardation; polarization;

D O I：

10.1016/j.stam.2004.01.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the lasing characteristics of a dye-doped nematic layer sandwiched by two polymeric cholesteric liquid crystal (CLC) films as photonic band gap (PBG) materials. The nematic layer acts as a defect layer, the anisotropy of which brings about the following remarkable optical characteristics: (1) reflectance in the PBG region exceeds 50% due to the retardation effect, being unpredictable from a single CLC film; (2) efficient lasing occurs either at the defect mode wavelength or at the photonic band edge; and (3) the lasing emission due to both the defect mode and the photonic band edge mode contains both right- and left-circular polarizations, while the lasing emission from a dye-doped single CLC layer with a left-handed helix is left-circularly polarized. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：437 / 441

页数：5

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