Thickness dependency of nonlinear optical properties in ITO/Sn composite films  

作　　者：南博洋 洪瑞金 陶春先 王琦 林辉 韩朝霞 张大伟 Boyang Nan;Ruijin Hong;Chunxian Tao;Qi Wang;Hui Lin;Zhaoxia Han;Dawei Zhang(Engineering Research Center of Optical Instrument and System,Ministry of Education and Shanghai Key Laboratory of Modern Optical System,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]Engineering Research Center of Optical Instrument and System,Ministry of Education and Shanghai Key Laboratory of Modern Optical System,University of Shanghai for Science and Technology,Shanghai 200093,China

出　　处：《Chinese Optics Letters》2023年第8期65-70,共6页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61775141 and 62075133).

摘　　要：In this study,a batch of indium tin oxide(ITO)/Sn composites with different ratios was obtained based on the principle of thermal evaporation by an electron beam.The crystalline structure,surface shape,and optical characterization of the films were researched using an X-ray diffractometer,an atomic force microscope,a UV-Vis-NIR dual-beam spectrophotometer,and an open-hole Z-scan system.By varying the relative thickness ratio of the ITO/Sn bilayer film,tunable nonlinear optical properties were achieved.The nonlinear saturation absorption coefficientβmaximum of the ITO/Sn composites is−10.5×10^(−7)cm/W,approximately 21 and 1.72 times more enhanced compared to monolayer ITO and Sn,respectively.Moreover,the improvement of the sample nonlinear performance was verified using finite-difference in temporal domain simulations.

关 键 词：ITO/Sn composite film Z-SCAN nonlinear absorption characteristic synergistic effect electric field 

分 类 号：O437[机械工程—光学工程] TB383.2[理学—光学]