有机材料ZnTBP-CA-PhR的非线性吸收和光学限幅性能

报道了一种新型有机材料ZnTBP-CA-PhR的光学非线性吸收特性，此材料在激光作用下，在可见光区域具有反饱和吸收，再反饱和吸收和饱和吸收效应.同时发现该材料优良的光学限幅性能，不仅光限幅的阈值低，而且限幅前光透射呈线性状态没有光学非线性效应.用5能级结构模型及速率方程模拟了饱和及反饱和的实验曲线，分析了非线性吸收等的物理机理.

Study on nonlinear absorption and optical limiting properties in an organic material ZnTBP-CA-PhR

In this paper the nonlinear absorption in the organic material ZnTBP-CA-PhR is reported. Saturable absorption, reverse saturable absorption and re-reverse saturable absorption under an Ar+ laser beam in visible light range were observed. This material has fine optical limiting properties. Its intensity threshold is lower than that of other materials and there is no nonlinear optical effect before input intensity reaches the threshold. In order to analyse the physical mechanism of nonlinear absorption of this material, a five-level model is presented using the rate equation theory to simulate the saturable absorption and reverse saturable absorption experimental results.