期刊
JOURNAL OF LASER APPLICATIONS
卷 25, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.2351/1.4809615
关键词
nanostructures; photoluminescence; scattering; random laser
资金
- DRDO (New Delhi)
Photoluminescence of Rhodamine B dye solution containing nanostructures of titanium dioxide (nanoparticles, nanorods, and nanotubes) was investigated at various optical excitation intensities. The stimulated emission was observed owing to multiple scattering of photons in the dye solution. The threshold intensity, emission wavelength, and profile of stimulated emission are different for different nanostructures. Single and double emission peaks were observed, respectively, at low (10(-3) M) and high (10(-2) M) dye concentrations. The stimulated emission characteristics with nanostructures dispersed in dye solution are attributed to the nonresonant scattering. (C) 2013 Laser Institute of America.
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