Stochastic Simulator for modeling the transition to lasing

TL;DR

This paper introduces a stochastic simulator based on semiclassical physics to efficiently model the lasing transition across various device sizes, capturing fluctuations and dynamical behavior.

Contribution

The novel stochastic simulator provides a computationally efficient method to model laser transitions, including fluctuations and dynamics, applicable from nanolasers to macroscopic lasers.

Findings

Steady-state predictions align with traditional models and phase transition theories.

The simulator captures fluctuations at the lasing threshold.

It efficiently provides dynamical information about laser behavior.

Abstract

A Stochastic Simulator (SS) is proposed, based on a semiclassical description of the radiation-matter interaction, to obtain an efficient description of the lasing transition for devices ranging from the nanolaser to the traditional "macroscopic" laser. Steady-state predictions obtained with the SS agree both with more traditional laser modeling and with the description of phase transitions in small-sized systems, and provide additional information on fluctuations. Dynamical information can easily be obtained, with good computing time efficiency, which convincingly highlights the role of fluctuations at threshold.