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<p>Random lasing occurs as a result of coherent optical feedback from random scattering centers. Plasmonic nanostructures, such as silver or gold nanoparticles, efficiently scatter light due to the formation of hot spots and optical confinement at the nanoscale. In this work, using silver nanocubes as highly efficient light scattering centers, a broadband plasmon assisted lasing action of halide perovskite materials is demonstrated. By embedding silver nanocubes in CH<sub>3</sub>NH<sub>3</sub>PbBr<sub>3</sub> and CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> solutions, narrow bandwidth lasing modes with a full width at half-maximum of approximately 1&#xa0;nm are supported. It is observed that the lasing thresholds of perovskites differ for glass and gold substrates (18.05 vs. 16.50 W/cm<sup>2</sup>) and for different nanocube concentrations. Results of time-resolved measurements indicate a significant shortening in the decay time of the emission above the lasing threshold, implying a stimulated emission process. The results of this work thus provide a pathway to generate coherent light sources from widely studied perovskite materials.</p>

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Silver nanocube-assisted random lasing of perovskite materials

  • 期刊论文

  • 发表日期：

    2025年9月19日

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  • Yagya Woli,
  • Bryson Krause,
  • Thang Hoang

摘要

Random lasing occurs as a result of coherent optical feedback from random scattering centers. Plasmonic nanostructures, such as silver or gold nanoparticles, efficiently scatter light due to the formation of hot spots and optical confinement at the nanoscale. In this work, using silver nanocubes as highly efficient light scattering centers, a broadband plasmon assisted lasing action of halide perovskite materials is demonstrated. By embedding silver nanocubes in CH3NH3PbBr3 and CH3NH3PbI3 solutions, narrow bandwidth lasing modes with a full width at half-maximum of approximately 1 nm are supported. It is observed that the lasing thresholds of perovskites differ for glass and gold substrates (18.05 vs. 16.50 W/cm2) and for different nanocube concentrations. Results of time-resolved measurements indicate a significant shortening in the decay time of the emission above the lasing threshold, implying a stimulated emission process. The results of this work thus provide a pathway to generate coherent light sources from widely studied perovskite materials.