Plasmonic multi-wavelength random laser by gold nanoparticles doped into glass substrate

Plasmonic thin random lasers have many applications in photonic sensors and communications. In this report, plasmonic thin random lasers were fabricated based on Au nanoparticles diffused doped a glass substrate. To this purpose, we use physical vapor deposition to produce a thin gold film, and using thermal annealing in the oven, we reach gold nanoparticles doped the glasses. Three samples were fabricated with these substrates, which were covered by different concentrations of Rhodamine 6G gain media and pumped by nanosecond green laser to record random lasing output. Our results show that in the middle concentration of Rh6G over the gold nanoparticles, we have good efficiency of random lasing with two separate lasing works compared to two other low and high concentrations.