Temporal dark polariton solitons

TL;DR

This paper predicts the formation of stable dark and anti-dark polariton solitons in waveguides due to strong light-matter coupling, nonlinear interactions, and dispersion effects, without external pumping.

Contribution

It introduces the concept of temporal dark polariton solitons resulting from exciton-photon interactions in waveguides, highlighting their stability and existence conditions.

Findings

Dark solitons are stable over a broad parameter range.

Anti-dark solitons are inherently unstable.

Solitons exist outside the linear system's forbidden frequency gap.

Abstract

We predict that strong coupling between waveguide photons and excitons of quantum well embedded into waveguide results in the formation of hybrid dark and anti-dark light-matter solitons. Such temporal solitons exist due to interplay between repulsive excitonic nonlinearity and giant group velocity dispersion arising in the vicinity of excitonic resonance. Such fully conservative states do not require external pumping to counteract losses and form continuous families parameterized by the power-dependent phase shift and velocity of their motion. Dark solitons are stable in the considerable part of their existence domain, while anti-dark solitons are always unstable. Both families exist outside forbidden frequency gap of the linear system.