Finite-Difference Time-Domain Analysis of Twist-Defect-Mode Lasing Dynamics in Cholesteric Photonic Liquid Crystal
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概要
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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.
- 2012-04-25
著者
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Matsui Tatsunosuke
Department O Electronic Engineering Graduate School Of Engineering Osaka University
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Kitaguchi Masahiro
Department Of Electrical And Electronic Engineering Graduate School Of Engineering Mie University
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Matsui Tatsunosuke
Department of Electrical and Electronic Engineering, Graduate School of Engineering, Mie University, Tsu 514-8507, Japan
関連論文
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- Finite-Difference Time-Domain Analysis of Twist-Defect-Mode Lasing Dynamics in Cholesteric Photonic Liquid Crystal
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