Rotating patterns in polariton condensates in ring-shaped potentials under bichromatic pump

TL;DR

This paper investigates rotating nonlinear localized modes in a polariton condensate within a ring-shaped potential driven by bichromatic vortex laser beams, revealing resonance phenomena, bistability, and the influence of interactions.

Contribution

It introduces a novel system of polariton condensates driven by bichromatic vortex pumps in a ring potential, demonstrating steady rotation and resonance effects not previously explored.

Findings

Rotating localized modes can be excited with frequencies determined by pump properties.

Resonance occurs when pump frequencies match eigenmodes, causing amplitude growth.

Polariton interactions cause bistability and tilt resonance curves.

Abstract

We consider a polariton condensate in a microcavity driven by a bichromatic resonant pump formed by two vortical laser beams carrying different topological charges. The system is additionally confined in a ring-shaped potential. We show that in this system steadily rotating nonlinear localized modes can be excited, whose angular rotation frequency is determined by optical frequencies and topological charges of the pump beams. When pump frequencies approach eigenfrequencies of the modes of the ring potential, resonant growth of peak amplitude of the excited states occurs. Repulsive polariton-polariton interactions lead to tilting of the resonance curves and appearance of bistability of rotating patterns.