Nonlinear optical properties of near-infrared region Ag<sub>2</sub>S quantum dots pumped by nanosecond laser pulses
Liwei LiuSchool of Science, Changchun University of Science and Technology, Changchun, Jilin, 130022, China ; International Joint Research Center for Nanophotonics and Biophotonics, Changchun, Jilin, 130022, ChinaSi-yi HuSchool of Science, Changchun University of Science and Technology, Changchun, Jilin, 130022, China ; International Joint Research Center for Nanophotonics and Biophotonics, Changchun, Jilin, 130022, ChinaYinping DouSchool of Science, Changchun University of Science and Technology, Changchun, Jilin, 130022, ChinaTianhang LiuSchool of Science, Changchun University of Science and Technology, Changchun, Jilin, 130022, ChinaJingquan LinSchool of Science, Changchun University of Science and Technology, Changchun, Jilin, 130022, ChinaYue WangSchool of Science, Changchun University of Science and Technology, Changchun, Jilin, 130022, China ; International Joint Research Center for Nanophotonics and Biophotonics, Changchun, Jilin, 130022, China
2015en
ABI
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This study investigates near-infrared region Ag2S quantum dots (QDs) and their nonlinear optical response under 532 nm nanosecond laser pulses. Our experimental result shows that nonlinear transmission is reduced from 0.084 to 0.04. The observed narrowing behavior of the output pulse width shows superior optical limiting. We discuss the physical mechanisms responsible for the nonlinear optical response of the QDs. The average size of the nanocrystals was 5.5 nm. Our results suggest the possibility of using these Ag2S QDs for photoelectric, biosensor, optical ranging, and self-adaptive technologies.
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