Manoeuvring a natural scatterer system in random lasing action and a demonstration of speckle free imaging

Abstract

This report dominantly focused on employment of natural micro-pillars, embedded on the surface of bambusa tulda leaves, as scattering centres for achieving a single mode random laser (RL) at ∼582 nm with a lower line width (∼1.8 nm) and lasing threshold (132 W/cm2) in Rhodamine-B dye gain medium. The stability in performances is checked over 2 months of duration and scattering activities of the natural micro-pillars are confirmed via numerical simulation using COMSOL and power Fourier transform (PFT) analyses. The demonstration of speckle-free imaging established the low coherence of the RL light. The plant-extricated, handy, low-cost, and simple RL system is proposed to be a new platform having diverse future photonic applications.