Plasmonic Random Laser Based on Deformed Double Metallic Core Shell NPs

Key Points

• The aim is to investigate the production and characterization of various plasmonic core-shell nanoparticles and their effect on random laser performance.
• Produced nanoparticles via laser ablation in liquid.
• Characterized silver, core-shell gold-silver, and core-shell silver-gold nanoparticles.
• Applied an external voltage to a random laser with Rhodamine 6G as the gain medium.
• Pumped nanoparticles using a 532 nm nanosecond pulse laser.
• Fluorescence spectrum of the nanoparticles is amplified when pumping energy exceeds a threshold.
• Narrow peaks in the fluorescence spectrum had a full width at half maximum (FWHM) of less than 10 nm.
• FWHM values were approximately 0.42 nm for Ag@Au NPs and 0.34 nm for Ag*@Au NSs.
• The findings support the feasibility of creating compact random laser sources.

Abstract