Random laser action in semiconductor powder

被引：1545

作者：

Cao, H ^{[1
]}

Zhao, YG

Ho, ST

Seelig, EW

Wang, QH

Chang, RPH

机构：

[1] Northwestern Univ, Dept Phys & Astron, Mat Res Ctr, Evanston, IL 60208 USA

[2] Northwestern Univ, Dept Elect & Comp Engn, Mat Res Ctr, Evanston, IL 60208 USA

[3] Northwestern Univ, Dept Mat Sci & Engn, Mat Res Ctr, Evanston, IL 60208 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.82.2278

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first observation of random laser action with coherent feedback in semiconductor powder. Since the scattering mean free path is less than the emission wavelength, recurrent light scattering arises and provides coherent feedback for lasing. Discrete lasing modes have been observed above the threshold. The dependence of the lasing threshold intensity on the excitation volume agrees with the random laser theory. Laser emission from the powder could be observed in all directions. This observation also provides direct evidence for the existence of recurrent scattering of light.

引用

页码：2278 / 2281

页数：4

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