对人工合成金刚石的三阶非线性光学极化率的研究

金刚石是一种有着许多优异的物理、化学性质的宽禁带半导体材料,因而它被视作适宜制作光电子器件的材料。基于克尔效应理论,我们设计了一种简便易行的测量合成金刚石的三阶非线性光学极化率的方法。在实验中,我们搭建了横向电光调制系统,以人工合成的Ⅰ型金刚石为样品,测量出在光波长为650nm时合成金刚石单晶的三阶非线性光学极化率张量中的元素χ1212(2)=2.17×10-23m2V2。

Diamonds are wide-gap semiconductors possessing excellent physical and chemical properties; thus, they are regarded as very appropriate materials for optoeleetronic devices. Based on Kerr effect, we introduce a simple and feasible method for measuring the third-order nonlinear optical susceptibility of synthetic diamonds. In the experiment, synthetic type I sample and transverse electro-optic modulation system are utilized. As for the laser with the wavelength of 650 nm, the third-order nonlinear optical susceptibility of synthetic diamonds is obtained at X 1212 （2）=2.17×10^-23 m2/V2.