2D tunable all-solid-state random laser in the visible

TL;DR

This paper demonstrates a 2D solid-state random laser in the visible spectrum with tunable emission properties, controlled by scatterer density and pump area, offering a compact on-chip laser source and a platform for non-Hermitian photonics.

Contribution

It introduces a novel 2D all-solid-state random laser with tunable emission and coherence properties, advancing on-chip laser technology and photonics research.

Findings

Optimal scatterer density minimizes threshold and maximizes scattering.

Laser emission can be red-shifted by adjusting scatterer density or pump area.

Spatial coherence is controllable via pump area variation.

Abstract

A two-dimensional (2D) solid-state random laser emitting in the visible is demonstrated, in which optical feedback is provided by a controlled disordered arrangement of air-holes in a dye-doped polymer film. We find an optimal scatterer density for which threshold is minimum and scattering is the strongest. We show that the laser emission can be red-shifted by either decreasing scatterer density or increasing pump area. We show that spatial coherence is easily controlled by varying pump area. Such a 2D random laser provides with a compact on-chip tunable laser source and a unique platform to explore non-Hermitian photonics in the visible