染料掺杂向列相液晶中随机激光的偏振和偏振控制。

Polarization and polarization control of random lasers from dye-doped nematic liquid crystals.

机构信息

Department of Physics, Harbin Institute of Technology, Harbin 150001, China.

出版信息

Opt Lett. 2013 May 1;38(9):1557-9. doi: 10.1364/OL.38.001557.

DOI:10.1364/OL.38.001557

Abstract

A polarimetric study of random laser (RL) emitted from dye-doped nematic liquid crystals (NLCs) is presented. We observed linearly polarized light, the orientation of which is in proximity to the bisection between the polarization direction at the maximal scattering in NLCs and the nematic director. Any arbitrary linear polarization of RLs can be obtained by rotating the NLC sample. The efficiency and output uniformity over the complete direction angle of 2π can be optimized by choosing a proper pump polarization.

摘要

本文对染料掺杂向列相液晶随机激光（RL）的偏振特性进行了研究。实验观察到了线偏振光，其偏振方向接近于 NLC 中最大散射时偏振方向与向列型指向矢夹角的平分线。通过旋转 NLC 样品可以获得 RL 的任意线偏振。通过选择合适的泵浦偏振，可以优化 RL 在 2π 全方向角内的效率和输出均匀性。