Finite-Difference Time-Domain Analysis of Twist-Defect-Mode Lasing Dynamics in Cholesteric Photonic Liquid Crystal

被引：4

作者：

Matsui, Tatsunosuke ^{[1
,2
]}

Kitaguchi, Masahiro ^{[1
]}

机构：

[1] Mie Univ, Grad Sch Engn, Dept Elect & Elect Engn, Tsu, Mie 5148507, Japan

[2] Mie Univ, Ctr Ultimate Technol Nanoelect, Tsu, Mie 5148507, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2012年 / 51卷 / 04期

关键词：

LASERS; MEDIA;

D O I：

10.1143/JJAP.51.04DK02

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have numerically investigated lasing dynamics from a twist defect in a cholesteric liquid crystal (CLC) by an auxiliary differential equation finite-difference time-domain (ADE-FDTD) method. As ADEs, the equation of motion of polarization described on the basis of the classical electron oscillator (Lorenz) model and the rate equation in a four-level energy structure are incorporated. A lower lasing threshold has been obtained from the twist-defect mode (TDM) than from band-edge lasing. Standing-wave-like electric fields are strongly localized only in the vicinity where a twist defect is introduced into a CLC, which works as a distributed feedback TDM laser source. The oscillation direction of a standing-wave electric field is not parallel or perpendicular to LC molecules, which is quite different from the bulk CLC case. Our results may be useful for creating more efficient TDM-based CLC lasers. (C) 2012 The Japan Society of Applied Physics

引用

页数：6

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