Lowering the Lasing Threshold by Introducing Cholesteric Liquid Crystal Films to Dye-Doped Cholesteric Liquid Crystal Cell Surfaces
Lowering the Lasing Threshold by Introducing Cholesteric Liquid Crystal Films to Dye-Doped Cholesteric Liquid Crystal Cell Surfaces
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DOI：
10.1143/jjap.44.7966
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发表时间：
2005-11
影响因子：
1.5
通讯作者：
Kazuhiro Amemiya;M. Song;Y. Takanishi;K. Ishikawa;S. Nishimura;T. Toyooka;H. Takezoe
中科院分区：
文献类型：
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作者：
Kazuhiro Amemiya;M. Song;Y. Takanishi;K. Ishikawa;S. Nishimura;T. Toyooka;H. Takezoe
研究了引入聚合物胆甾液晶（PCLC）薄膜对染料掺杂胆甾液晶（CLC）分布反馈（DFB）腔激光阈值的影响。用于反射泵浦光束的PCLC薄膜可以有效利用入射能量，而用于反射发射的PCLC薄膜则有助于放大受激发射。结果，引入两种 PCLC 薄膜的电池的激光阈值降低了约 60%。还发现，不仅激发能量存在激光阈值，而且发射强度也存在激光阈值。即，无论细胞结构如何，激光在一定的发射水平下开始发生。
The effect of the introduction of polymer cholesteric liquid crystal (PCLC) films on the threshold of dye-doped cholesteric liquid crystal (CLC) distributed feedback (DFB) cavity lasing has been investigated. A PCLC film used to reflect a pump beam brings about the efficient use of incident energy, whereas a PCLC film used to reflect the emission contributes to amplifying the stimulated emission. As a result, the cell, in which both PCLC films are introduced, gains about a 60% reduction in the lasing threshold. It is also found that a lasing threshold exists not only for the excitation energy but also for the emission intensity. Namely, the lasing starts to occur at a certain emission level irrespective of the cell structures.