Polariton Induced Enhanced Emission from an Organic Dye under Strong Coupling Regime

TL;DR

This paper demonstrates that strong exciton-photon coupling in organic microcavities enhances photoluminescence, independent of absorption-emission overlap, opening new avenues for organic polariton-based devices.

Contribution

It shows that emission enhancement occurs regardless of absorption-emission overlap, highlighting potential for organic polariton applications.

Findings

Significant increase in photoluminescence intensity under strong coupling.

Emission properties are independent of absorption-emission overlap.

Potential for organic polariton condensates and lasers.

Abstract

Exciton-polaritons in semiconductors are quasi-particles which have recently shown the capability to undergo phase transition into a coherent hybrid state of light and matter. The observation of such quasi-particles in organic microcavities has attracted increasing attention for their characteristic of reaching condensation at room temperature. In this work we demonstrate that the emission properties of organic polaritons do not depend on the overlap between the absorption and emission states of the molecule and that the emission dynamics are modified in the strong coupling regime, showing a significant enhancement of the photoluminescence intensity as compared to the bare dye. This paves the way to the investigation of molecules with large absorption coefficients but poor emission efficiencies for the realization of polariton condensates and organic electrically injected lasers by exploiting strong exciton-photon coupling regimes.