Twist-Defect-Mode Lasing in Photopolymerized Cholesteric Liquid Crystal
Twist-Defect-Mode Lasing in Photopolymerized Cholesteric Liquid Crystal
复制标题
光聚合胆甾液晶中的扭曲缺陷模式激光
DOI：
10.1143/jjap.42.l472
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发表时间：
2003
影响因子：
1.5
通讯作者：
K. Yoshino
中科院分区：
文献类型：
--
作者：
M. Ozaki;R. Ozaki;T. Matsui;K. Yoshino
在由两层光聚合胆甾相液晶(PCLC)组成的复合膜的透射谱中，实验证明了扭转缺陷模(TDM)。PCLC的自组织螺旋结构表现为一维(1-D)光子晶体，在两个PCLC层的界面处，扭转缺陷是指向矢绕螺旋轴旋转的不连续性，导致了TDM。在染料掺杂的双复合PCLC薄膜中也观察到了基于TDM的光泵浦激光作用。在高于阈值的高激发能量下，在PCLC螺旋结构一维光子带隙中间的TDM波长处观察到了激光作用。
The twist defect mode (TDM) has been experimentally demonstrated in the transmission spectrum of a composite film consisting of two photopolymerized cholesteric liquid crystal (PCLC) layers. The self-organized helical structure of PCLC acts as a one-dimensional (1-D) photonic crystal, and the twist defect which is a discontinuity of the director rotation around the helix axis at an interface of two PCLC layers, induces the TDM. Optically pumped laser action based on the TDM has also been observed in a dye-doped double composite PCLC film. At a high excitation energy above the threshold, the laser action has been observed at the TDM wavelength in the middle of the 1-D photonic band gap of the PCLC helical structure.