Universal single-mode lasing in fully chaotic two-dimensional microcavity lasers under continuous-wave operation with large pumping power

TL;DR

This paper develops a theory demonstrating that fully chaotic 2D microcavity lasers can reliably operate in a stable single-mode regime under high continuous-wave pumping, due to nonlinear effects from cavity deformation and mode interactions.

Contribution

It provides a universal theoretical framework explaining stable single-mode lasing in chaotic microcavities, supported by linear stability analysis of Maxwell-Bloch equations.

Findings

Guarantees the existence of stable single-mode lasing

Proves the nonexistence of stable multimode lasing

Aligns with experimental and numerical observations

Abstract

For a fully chaotic two-dimensional (2D) microcavity laser, we present a theory that guarantees both the existence of a stable single-mode lasing state and the nonexistence of a stable multimode lasing state, under the assumptions that the cavity size is much larger than the wavelength and the external pumping power is sufficiently large. It is theoretically shown that these universal spectral characteristics arise from the synergistic effect of two different kinds of nonlinearities: deformation of the cavity shape and mode interaction due to a lasing medium. Our theory is based on the linear stability analysis of stationary states for the Maxwell-Bloch equations and accounts for single-mode lasing phenomena observed in real and numerical experiments of fully chaotic 2D microcavity lasers.