Lasing thresholds of cholesteric liquid crystals lasers
Lasing thresholds of cholesteric liquid crystals lasers
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DOI：
10.1080/15421400590930782
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发表时间：
2005-01-01
影响因子：
0.7
通讯作者：
Abbate, G
中科院分区：
文献类型：
--
作者：
Cao, W;Palffy-Muhoray, P;Abbate, G
胆甾相液晶是一种一维光子带隙材料。由于分布反馈，低阈值无反射镜激光可以发生在染料掺杂和纯CLC中。In.为了优化激光条件，我们研究了激光阈值与染料浓度和样品厚度的关系。特别地，我们已经研究了染料浓度在0.1-3.0重量%范围内，并且单元厚度在5-50 μ m范围内。我们发现该系统有一个浅的激光阈值极小值。和.可以的.在染料浓度为0.3-2.4重量%和样品厚度为10-50 μ m的范围内有效地操作。我们讨论的物理过程负责观察到的行为。
Cholesteric liquid crystals (CLCs) are one dimensional photonic band-gap materials. Due to distributed feedback, low threshold mirrorless lasing can, occur in dye-doped and pure CLCs. In. order to optimize the lasing conditions, we have studied the dependence of the lasing threshold on dye concentration and sample thickness. In particular, we have studied dye concentrations in the range of 0.1-3.0 wt%, and cell thicknesses are, in the range of 5-50 mu m. We have found that the system has a shallow lasing threshold minimum. and. can. operate efficiently in the range of dye concentrations of 0.3-2.4 wt% and sample thicknesses of 10-50 pin. We discuss the physical processes responsible for the observed behaviour.