Random laser action in organic-inorganic nanocomposites

被引:105
作者
Anglos, D
Stassinopoulos, A
Das, RN
Zacharakis, G
Psyllaki, M
Jakubiak, R
Vaia, RA
Giannelis, EP
Anastasiadis, SH
机构
[1] Fdn Res & Technol Hellas, Inst Elect Struct & Laser, Iraklion 71110, Crete, Greece
[2] Univ Crete, Dept Phys, Iraklion 71103, Crete, Greece
[3] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA
[4] USAF, Res Lab, MLBP, Wright Patterson AFB, OH 45433 USA
[5] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA
关键词
D O I
10.1364/JOSAB.21.000208
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Random laser action is demonstrated in organic-inorganic, disordered hybrid materials consisting of ZnO semiconductor nanoparticles dispersed in an optically inert polymer matrix. The ZnO particles provide both the gain and the strong scattering power that leads to light trapping due to multiple elastic scattering, whereas the polymer matrix offers ease of material fabrication and processability in view of potential applications. Excitation of the nanohybrids by a laser pulse with duration shorter than the ZnO photoluminescence lifetime leads to a dramatic increase in the emitted light intensity accompanied by a significant spectral and temporal narrowing above a certain threshold of the excitation energy density. Critical laser and material parameters that influence the observed laser-like emission behavior are investigated in a series of nanocomposites. (C) 2004 Optical Society of America.
引用
收藏
页码:208 / 213
页数:6
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