摘要
介绍了一种简单而灵敏的单光束测量非线性折射率ｎ２大小和符号的实验方法（Ｚ—Ｓｃａｎ）。样品在聚焦的高斯光束ｚ方向上移动，得到远场通过小孔后的透射率曲线，由该曲线很容易计算出ｎ２。使用ＣＷＣＯ２激光器对ＩｎＳｂ样品进行测量，得到该样品相对１０．６μｍ波长的非线性折射率为１．８０×１０－４ｅｓｕ。
A simple yet highly' sensitive single beam experimental technique for the determination of both the sign and magnitude of nonlinear refraction n2 is presented. The sample is moved along the Z direction of a focused Gaussian beam. The resultant plot of transmittance through an aperture in the far field yields a dispersion-shaped curve from which n2 is casily calculated.The InSb sample is measured by using a CWCO2 laser, and its n2 is 1.88 x 10-4 esu at the wavelength of 10.6μm.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
1995年第1期41-44,共4页
Journal of Harbin Institute of Technology
