Transition from incoherent to coherent random lasing by adjusting silver nanowires

The features of silver nanowire random laser (different sizes and concentrations)-based random lasers with a fixed concentration of laser dye rhodamine B pumped by a nanosecond pulsed laser were indicated. It was shown that the sizes and concentrations of scattering centers greatly affect the optical amplification mechanism, thresholds, narrowing the emission intensity and then the transition from the incoherent to a coherent type of random laser. The emergence of spikes and the increase in their number are also discussed under the influence of the size and concentration of silver (Ag) nanowires. The gain narrowing and the enhancement factor were calculated to reinforce obtained results.

Automated summary

The study showed that the sizes and concentrations of silver nanowires have a significant impact on the optical amplification mechanism, thresholds, narrowing of emission intensity, and the transition from incoherent to coherent random laser. The emergence of spikes and their increase in number are also discussed under the influence of silver nanowires. Gain narrowing and enhancement factor calculations were done to reinforce the obtained results.