Yang Liling, Feng Guoying, Yi Jiayu, Yao Ke, Deng Guoliang, Zhou Shouhuan
Department of Opto-electronic, Sichuan University, Chengdu 610064, China.
Appl Opt. 2011 May 1;50(13):1816-21. doi: 10.1364/AO.50.001816.
We have studied the random laser action in Rhodamine 6G (Rh6G) ethylene glycol solution with Al nanoparticles. The experiment results are obtained by pumping with a nanosecond (7 ns) laser pulse, which demonstrated the existence of effective random laser emission. It is found that the threshold of the random laser depends on the concentration of the Rh6G and the concentration of Al nanoparticles. The concentration and diameter of Al nanoparticles have effects on the optical path; a higher concentration or a larger diameter results in a shorter optical path length. Also multimode survival and mode competition have been observed at a relatively high concentration (0.08 M) of Rh6G, where the concentration of Al nanoparticles is 0.0015 M.
我们研究了含有铝纳米颗粒的罗丹明6G（Rh6G）乙二醇溶液中的随机激光作用。实验结果是通过用纳秒（7纳秒）激光脉冲泵浦获得的，这证明了有效随机激光发射的存在。发现随机激光的阈值取决于Rh6G的浓度和铝纳米颗粒的浓度。铝纳米颗粒的浓度和直径对光路有影响；较高的浓度或较大的直径会导致较短的光程长度。在Rh6G浓度相对较高（0.08 M）且铝纳米颗粒浓度为0.0015 M的情况下，还观察到了多模存活和模式竞争。
