Competition between two lasing modes of sulforhodamine 640 in highly scattering media

被引：41

作者：

Sha, WL

Liu, CH

Liu, F

Alfano, RR

机构：

[1] CUNY CITY COLL,DEPT PHYS,NEW YORK,NY 10031

[2] CUNY,GRAD SCH,NEW YORK,NY 10031

来源：

OPTICS LETTERS | 1996年 / 21卷 / 16期

关键词：

D O I：

10.1364/OL.21.001277

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Two lasing modes are observed for Sulforhodamine 640 in highly scattering media pumped by 3-ns 532-nm laser pulses. The stimulated-emission thresholds are found to depend on both concentration of laser dye and scattering particle density. At 2.5 X 10(-2) M dye solution with TiO2 scattering nanoparticles from 5 x 10(9) cm(-3) to 10(11) cm(-3), the thresholds are found to decrease by more than 2 orders of magnitude. The dominating lasing modes are found to switch from 650 to 620 nm with the increase of density of scatterers. (C) 1996 Optical Society of America

引用

页码：1277 / 1279

页数：3

共 12 条

[1] PICOSECOND MEASUREMENTS OF 3,3'-DIETHYLOXADICARBOCYANINE IODIDE AND PHOTOISOMER FLUORESCENCE [J].