Nonlinear optical limiting effect of graphene dispersions at 3.8μm  

作　　者：吴政南 路元刚 彭楗钦 黄剑 赫崇君 Zhengnan Wu;Yuangang Lu;Jianqin Peng;Jian Huang;Chongjun He(Key Laboratory of Space Photoelectric Detection and Perception of Ministry of Industry and Information Technology,College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;College of Science,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]Key Laboratory of Space Photoelectric Detection and Perception of Ministry of Industry and Information Technology,College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China [2]College of Science,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China

出　　处：《Chinese Optics Letters》2023年第2期81-86,共6页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC)(Nos.62175105 and 61875086);the Fundamental Research Funds for the Central Universities(No.56XBC22047)。

摘　　要：We investigate the nonlinear optical limiting effect of novel graphene dispersions and graphene dispersions in carbon tetrachloride at a wavelength of 3.8μm.The transmittances of graphene dispersions in carbon tetrachloride under two different concentrations(0.004 and 0.008 mg/mL)and two different solution thicknesses(10 and 20 mm)are measured.The influences of concentration and thickness on the optical limiting effect of graphene dispersion are analyzed.Theoretical analysis of the experimental data shows that the main optical limiting mechanism of the new graphene dispersions is Mie scattering.The limiting capacity coefficient of the new graphene dispersion in carbon tetrachloride reaches 0.405 and the minimum transmittance reaches 0.292 when the concentration is 0.004 mg/mL and the thickness is 20 mm.The graphene dispersions in carbon tetrachloride can be used to achieve good nonlinear optical limiting effects at the wavelength of 3.8μm.

关 键 词：nonlinear optical limiting nonlinear scattering graphene dispersion 

分 类 号：TQ127.11[化学工程—无机化工] O437[机械工程—光学工程]