纳秒激光脉冲泵浦的近红外区域Ag2S量子点的非线性光学性质

Nonlinear optical properties of near-infrared region Ag2S quantum dots pumped by nanosecond laser pulses.

作者信息

Liu Li-Wei, Hu Si-Yi, Dou Yin-Ping, Liu Tian-Hang, Lin Jing-Quan, Wang Yue

机构信息

School of Science, Changchun University of Science and Technology, Changchun, Jilin, 130022, China ; International Joint Research Center for Nanophotonics and Biophotonics, Changchun, Jilin, 130022, China.

School of Science, Changchun University of Science and Technology, Changchun, Jilin, 130022, China.

出版信息

Beilstein J Nanotechnol. 2015 Aug 24;6:1781-7. doi: 10.3762/bjnano.6.182. eCollection 2015.

DOI:10.3762/bjnano.6.182

PMID:26425430

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4578410/

Abstract

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.

摘要

本研究调查了近红外区域的硫化银量子点（QDs）及其在532纳米纳秒激光脉冲下的非线性光学响应。我们的实验结果表明，非线性透过率从0.084降至0.04。观察到的输出脉冲宽度变窄行为显示出优异的光学限幅特性。我们讨论了量子点非线性光学响应的物理机制。纳米晶体的平均尺寸为5.5纳米。我们的结果表明，这些硫化银量子点可用于光电、生物传感器、光学测距和自适应技术。