Function optimization of diffusive nanotriangles in random lasers

Abstract

The random laser has the potential to be replaced with the conventional cavity laser for abundant nanophotonics applications. For this purpose, it is essential to investigate the effect of using different materials as the diffusive medium in the random laser. We theoretically studied two groups of diffusive nanoparticles with some common materials used in the random lasers: metals (Au, Ag, Al) and dielectrics (TiO2, Si, GaAs). First, we compared the random lasing behavior with metal and dielectric triangle/sphere nanoparticles through the scattering cross section calculations. Then, the physical characteristics of triangle/sphere nanoparticles of both categories were investigated, resulting in the optimum scattering condition for the nanoparticles. Noteworthy, we have supposed that the triangle nanoparticles are made with colloidal lithography and randomly distributed in Rhodamine 6G as a gain medium for all simulations. We investigated that aluminum and titanium dioxide are good scatterers to interact with the gain medium over the photoluminescence emission spectrum. This study paves the way to design a more effective and applicable random laser for many potential applications.

Recent progress and prospects of random lasers using advanced materials

“…This opens up new exciting areas of further research.Designing the RL platforms is an important aspect that will give optimum conditions for the scatterers for excellent scattering. A recent article discussed the random lasing behaviour of several metals and dielectric particles with different shapes (triangle and sphere) via the calculation of scattering cross-section 60 . ZnO nanorod arrays (NA) can be utilized as one of the good scatterers in random lasing.…”

“…A recent article discussed the random lasing behaviour of several metals and dielectric particles with different shapes (triangle and sphere) via the calculation of scattering cross-section. 60 ZnO nanorod arrays (NA) can be utilized as one of the good scatterers in random lasing. Instead, Abdullah Taha Ali et al employed SiO 2 with different thicknesses, capped by the ZnO NA.…”