Nanostructured Metal Aggregate-Assisted Lasing in Rhodamine 6G Solutions

Valery A. Donchenko, Yuri E. Geints, Vladimir A. Kharenkov, Alexey A. Zemlyanov

1Siberian Physico-Technical Institute, Tomsk, Russia 2Tomsk State University, Tomsk, Russia.
1Siberian Physico-Technical Institute, Tomsk, Russia 2V.E. Zuev Institute of Atmospheric Optics SB RAS, Tomsk, Russia.
Siberian Physico-Technical Institute, Tomsk, Russia.

DOI: 10.4236/opj.2013.38A002                

Abstract

We report on the experimental demonstration of considerable lowering of stimulated luminescence (lasing) threshold in R6G laser dye solution doped with metal agglomerates (Ag, Al, Ni) upon second harmonic of Nd:YAG-laser illumination. Due to strong structural coupling between individual nanoparticles, they may form fractal agglomerates providing an extreme optical pump-field enhancement near their complicated surface. For the first time, we have observed more than twofold increase in lasing efficiency of metal aggregated dye solution as compared to non-agglomerated monomeric metal nanocolloids. No random laser manifestation or surface plasmon-polariton resonances excitations were observed.

Keywords

Nano-Composite; Luminescence; Lasing; Metal Agglomerate; Surface Plasmon-Polariton Resonance

Conflicts of Interest

The authors declare no conflicts of interest.

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