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

被引：22

作者：

Liu, Li-wei ^{[1
,2
]}

Hu, Si-yi ^{[1
,2
]}

Dou, Yin-ping ^{[1
]}

Liu, Tian-hang ^{[1
]}

Lin, Jing-quan ^{[1
]}

Wang, Yue ^{[1
,2
]}

机构：

[1] Changchun Univ Sci & Technol, Sch Sci, Changchun 130022, Jilin, Peoples R China

[2] Int Joint Res Ctr Nanophoton & Biophoton, Changchun 130022, Jilin, Peoples R China

来源：

BEILSTEIN JOURNAL OF NANOTECHNOLOGY | 2015年 / 6卷

基金：

中国国家自然科学基金;

关键词：

nonlinear optics; quantum dots; silver sulfide (Ag2S); strong absorption; GOLD NANOPARTICLES; SILICATE-GLASSES; LIGHT-SCATTERING; ABSORPTION; SIZE; NANOCRYSTALS; NANORODS; EFFICIENCY; SHAPE; RED;

D O I：

10.3762/bjnano.6.182

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页码：1781 / 1787

页数：7

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