Nonlinear optical switching and all-figures of merit in Bi2S3-xSex/PMMA nanocomposite films investigated by Z scan under visible CW laser

作     者：M.Y.Shubar H.L.Saadon Saeed J.Abbas M.Y.Shubar;H.L.Saadon;Saeed J.Abbas

作者机构：Laser Applications Research Group(LARG)Department of PhysicsCollege of ScienceUniversity of BasrahBasrahIraq 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2020年第18卷第1期

页      面：75-80页

核心收录：

学科分类：0808[工学-电气工程] 080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 070207[理学-光学] 080401[工学-精密仪器及机械] 080501[工学-材料物理与化学] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 

主　　题：bismuth chalcogenides Bi2S3-xSex/PMMA nanocomposite Z-scan technique nonlinear absorption and refraction all-optical figures of merit 

摘      要：Bi2S3-xSex/poly(methyl methacrylate)(PMMA)nanocomposite films were prepared using microwave assisted synthesis with different compositions of *** structure,surface morphology,and optical properties were investigated to characterize the prepared nanocomposite *** crystallinity and optical band gap of the prepared Bi2S3-xSex/PMMA were affected by *** prepared samples showed a blue shift in the absorption *** laser power dependent nonlinear refraction and absorption of Bi2S3-xSex/PMMA nanocomposite films were investigated by using the Z-scan *** optical nonlinearity of the nanocomposite films exhibited switchover from negative nonlinear refraction to positive nonlinear refraction to negative nonlinear refraction effects,and from saturable absorption to reverse saturable absorption to saturable absorption with an increase and decrease in the *** interesting all-optical figure of merit was reported to assess the nanocomposite films for a practical *** was calculated that the device all-figures of merit were based on the nonlinear response,which is important for the all-optical switching *** results demonstrate that the optimized all-optical figures of merit can be achieved by adjusting the composition and input laser power,which can be used for the design of different all-photonic devices,and the results of nonlinear switching behavior can open new possibilities for using the nanocomposite films in laser Q-switching and mode-locking.