Ultrafast flow of interacting organic polaritons

TL;DR

This paper demonstrates ultrafast propagation of organic exciton-polaritons hybridized with Bloch Surface Waves, showing long-distance flow and strong nonlinear interactions at room temperature, enabling potential on-chip polariton devices.

Contribution

It introduces a new platform for organic polariton flow using Bloch Surface Waves, enabling room-temperature, long-distance propagation and nonlinear effects.

Findings

Polaritons propagate for hundreds of microns.

Remarkable third-order nonlinear interactions observed.

Potential for room-temperature on-chip polariton devices.

Abstract

The strong-coupling of an excitonic transition with an electromagnetic mode results in composite quasi-particles called exciton-polaritons, which have been shown to combine the best properties of their bare components in semiconductor microcavities. However, the physics and applications of polariton flows in organic materials and at room temperature are still unexplored because of the poor photon confinement in such structures. Here we demonstrate that polaritons formed by the hybridization of organic excitons with a Bloch Surface Wave are able to propagate for hundreds of microns showing remarkable third-order nonlinear interactions upon high injection density. These findings pave the way for the studies of organic nonlinear light-matter fluxes and for a technological promising route of dissipation-less on-chip polariton devices working at room temperature.