Two-threshold silver nanowire-based random laser with different dye concentrations

被引：22

作者：

Wang, Zhaona ^{[1
]}

Shi, Xiaoyu ^{[1
]}

Wei, Sujun ^{[1
]}

Sun, Yanyan ^{[1
]}

Wang, Yanrong ^{[1
]}

Zhou, Jing ^{[1
]}

Shi, Jinwei ^{[1
]}

Liu, Dahe ^{[1
,2
]}

机构：

[1] Beijing Normal Univ, Dept Phys, Appl Opt Beijing Area Major Lab, Beijing 100875, Peoples R China

[2] Nanchang Hang Kong Univ, Key Lab Nondestruct Test, Minist Educ, Nanchang 330063, Peoples R China

来源：

LASER PHYSICS LETTERS | 2014年 / 11卷 / 09期

基金：

中国国家自然科学基金;

关键词：

EMISSION; LIGHT; TRANSITION;

D O I：

10.1088/1612-2011/11/9/095002

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The feedback mechanisms of silver nanowire-based random lasers with different concentrations of laser dye rhodamine 6 G pumped by a nanosecond pulsed laser were demonstrated. It was shown that dye concentration greatly impacts on the optical amplification mechanism. At lower or higher dye concentrations, random lasers have a single threshold. At a proper concentration, the system shows transition from incoherent emission to coherent lasing and has two thresholds corresponding to incoherent feedback and coherent feedback, respectively. The corresponding physical mechanism was displayed. Also, the processes of fluorescence, incoherent feedback and coherent feedback were distinguished by the emission spectra in the time domain. The results will supply some guidance to clear the working mechanism of random lasers.

引用

页数：7

共 35 条

[1] Modes interaction and light transport in bidimensional organic random lasers in the weak scattering limit [J].