Self-Decelerating Bright Exciton-Polariton Solitons in Bound-State-in-Continuum Microcavities

TL;DR

This paper theoretically explores bright exciton-polariton solitons in engineered microcavities supporting Bound States in the Continuum, revealing their self-deceleration and stability properties for polaritonic flow control.

Contribution

It introduces a new theoretical framework for stabilizing and analyzing BIC-engineered polariton solitons, including analytical expressions for their dynamics and stability.

Findings

BICs stabilize exciton-polariton condensates against decay.

Bright solitons exhibit self-deceleration and can be halted.

Analytical models describe soliton trajectories and velocities.

Abstract

We theoretically investigate the formation and dynamics of bright exciton-polariton solitons within systems engineered to support Bound States in the Continuum. By employing a driven-dissipative Gross-Pitaevskii equation coupled with a rate equation for the excitonic reservoir, we demonstrate that BICs provide a robust platform for stabilizing the condensate against radiative decay. Utilizing a Lagrangian variational approach, we derive analytical expressions describing the trajectory and velocity of these bright solitonic excitations. Notably, we find that the propagation of these BIC-engineered solitons exhibits a distinct self-deceleration, eventually bringing them to a halt at a final position dictated by the initial conditions and intrinsic system parameters. Furthermore, we analyze the dynamical stability of these solitons. Our findings offer valuable insights into the manipulation of polaritonic flows in non-Hermitian systems.