一种新型非晶态分子材料的非线性光学折射率和吸收特性

用单光束扫描法测量了在532nm处一种新型非晶态分子材料5,5′Bis(dimesitylboryl)2,2′bithiophene的非线性折射率和吸收系数样品非线性透射特性的分析表明,在靠近线性吸收区的532nm处有饱和吸收存在由三能级饱和模型和Zscan法确定了饱和强度、非线性折射率的实部和虚部研究结果表明:这种新型非晶态分子材料具有非常好的光子学应用前景.

Nonlinear Optical Refractive and Absorption Properties of a Novel Amorphous Molecular Material

The nonlinear optical refractive indices and absorption coefficient of the novel amorphous molecular material, 5,5′-Bis(dimesitylboryl)-2,2′-bithiophene are measured by using the Z-scan technique with a nanosecond pulsed Nd:YAG laser at its second harmonic (532 nm) radiation. The nonlinear transmission characteristics exhibit saturable absorption at 532 nm closed to the linear absorption reign. The saturation intensity, the real and imaginary parts of the nonlinear refraction index along with their sign were determined by Z-scan method and explained by using the three-level saturable model. These results indicate that this novel amorphous molecular material is promising to photonic applications.