Nanostructured Metal Aggregate-Assisted Lasing in Rhodamine 6G Solutions

• 作者: Alexey A. Zemlyanov Valery A. Donchenko Vladimir A. Kharenkov Yuri E. Geints
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 化学
• 关键词: NANO-COMPOSITE Luminescence LASING METAL AGGLOMERATE Surface Plasmon-Polariton Resonance
• 年，卷（期）: 2013,（8）
• 页码范围: 13-17
• 页数: 5页
• 分类号: O6

摘要

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.