气溶胶粒子对光场增强的研究  

Light field enhancement in small aerosol droplets

作　　者：杨小丽[1] 刘炎焱[1] 万德明[1] 王俊波[1] 

机构地区：[1]电子科技大学应用所

出　　处：《激光杂志》1996年第1期17-20,共4页Laser Journal

摘　　要：本文用几何光学方法对光束通过透明气溶胶粒子时，产生的光场增强现象进行了分析。导出了气溶胶粒子前向临界区域光能密度有较大增强，而在光轴上相对较小。并对液态气溶胶粒子做了实验，用波长λ＝０．４８８μｍ的激光束照射气溶胶粒子（甘油），在实验中观察到了光场增强点。可以预言：光学击穿等非线性效应，将首先从增强点发生。The light field enhancement in the forward direction of sphere is derived using geometric optics. Weobtain a dramatic enhancement of the fields within or near the surface at the critical ring and low field enhancementat the axis and area around the axis. In our experiment,glycerol droplet is irradiate with Ar+ laser(= 0.488μm),We observed enhancement of the fields near the surface at the critical ring. Geometrical optics can be predicts regions of high field enhancements,where the emission of the nonlinear processes is expected to take place .and causing lowering the threshold laser intensity.

关 键 词：气溶胶粒子 光场增强 几何光学 非线性光学 

分 类 号：O435[机械工程—光学工程] O437[理学—光学]