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Plasmonically enhanced diffusive and subdiffusive metal nanoparticle-dye random laser
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10.1063/1.1894590
/content/aip/journal/apl/86/13/10.1063/1.1894590
http://aip.metastore.ingenta.com/content/aip/journal/apl/86/13/10.1063/1.1894590
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Measured extinction spectrum (curve a) from the silver suspension, showing a peak at . Curve b is the theoretical spectrum calculated from Mie theory for a diameter silver sphere, which peaks at . The width of the experimental spectrum originates from the size and shape dispersion in the sample. The inset shows the scanning electron microscope image of the polydisperse silver nanoparticles.

Image of FIG. 2.
FIG. 2.

Random lasing from silver nanoparticles in rhodamine 6G at a MFP . (a) The broadband fluorescence spectrum from the system pumped at below the lasing threshold. (b) The narrowband high-intensity emission spectrum with a linewidth of at a pump fluence, . (c) Spectrum of pure dye pumped at .

Image of FIG. 3.
FIG. 3.

Variation of the emission linewidth with pump fluence . The silver-scatterer-based random laser at (open triangle) performs on par with a dielectric-scatterer () based random laser (dotted line, closed circle) at .

Image of FIG. 4.
FIG. 4.

Dependence of the threshold energy fluence (open circles) and linewidth narrowing factor (filled circles) on scattering strength . Random lasing is observed over a wide optimal range of scattering strengths, centered around the crossover between subdiffusive and diffusive photon transport regimes. (Dotted vertical lines indicate the approximate transition from subdiffusive to diffusive scattering at .)

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/content/aip/journal/apl/86/13/10.1063/1.1894590
2005-03-21
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Plasmonically enhanced diffusive and subdiffusive metal nanoparticle-dye random laser
http://aip.metastore.ingenta.com/content/aip/journal/apl/86/13/10.1063/1.1894590
10.1063/1.1894590
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