Random lasing in strongly disordered medium

Using the time-dependent theory, we calculate the random-laser emission spectra in a two-dimensional strongly disordered medium. The calculation results show that in low dimensional systems, such as thin- film disordered media and planar waveguides, the larger the difference of the refractive indice...

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Bibliographic Details
Published in:	Chinese optics letters Vol. 10; no. 8; pp. 62 - 65
Main Author:	姚轲冯国英杨丽玲易家玉宋影松周寿桓
Format:	Journal Article
Language:	English
Published:	10-08-2012
Subjects:	平面波导无序介质时间依赖性激光发射光谱激光阈值激射计算结果随机
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Summary:	Using the time-dependent theory, we calculate the random-laser emission spectra in a two-dimensional strongly disordered medium. The calculation results show that in low dimensional systems, such as thin- film disordered media and planar waveguides, the larger the difference of the refractive indices between the scattering and background media, the smaller the lasing threshold. We also reveal the existence of multi-mode survival and mode competition. We experimentally obtain the emission spectra of a dye solution with Al particles doped at different pumping energies, and the experimental results agree well with the calculated ones.
Bibliography:	31-1890/O3 Ke Yao1, Guoying Feng1 , Liling Yang1, Jiayu Yi1, Yingsong Song2, and Shouhuan Zhou1,3 1 Department of Opto-Electronics, Sichuan University, Chengdu 610064, China 2 Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang 621900, China 3 North China Research Institute of Electro-Optics, Beijing 100015, China Using the time-dependent theory, we calculate the random-laser emission spectra in a two-dimensional strongly disordered medium. The calculation results show that in low dimensional systems, such as thin- film disordered media and planar waveguides, the larger the difference of the refractive indices between the scattering and background media, the smaller the lasing threshold. We also reveal the existence of multi-mode survival and mode competition. We experimentally obtain the emission spectra of a dye solution with Al particles doped at different pumping energies, and the experimental results agree well with the calculated ones.
ISSN:	1671-7694
DOI:	10.3788/COL201210.082901