Coherent random lasers in weakly scattering polymer films containing silver nanoparticles

被引：115

作者：

Meng, Xiangeng ^{[1
]}

Fujita, Koji ^{[1
,2
]}

Murai, Shunsuke ^{[1
]}

Tanaka, Katsuhisa ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Chem Mat, Nishikyo Ku, Kyoto 6158510, Japan

[2] Japan Sci & Technol Agcy JST, PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

PHYSICAL REVIEW A | 2009年 / 79卷 / 05期

关键词：

Fourier transforms; laser beams; light coherence; light scattering; microcavity lasers; nanoparticles; optical polymers; optical pumping; silver; solid lasers; STIMULATED-EMISSION; DYE;

D O I：

10.1103/PhysRevA.79.053817

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on the observations of coherent random lasers in weakly scattering polymer films embedded with silver nanoparticles. The dominant oscillation cavity calculated from the ensemble-averaged power Fourier transform spectrum of single-shot emission spectra is shorter by more than two orders of magnitude than the scattering mean-free path, indicating that the oscillation cavity is loosely associated with multiple scattering. We suggest that the coherent feedback arises from the cooperative effect of light scattering and field enhancement in the vicinity of silver nanoparticles.

引用

页数：7

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