Exciton-polariton emission from organic semiconductor optical waveguides

TL;DR

This study demonstrates room-temperature exciton-polariton emission from organic polymer waveguides doped with dye molecules, showing control over polariton momentum via waveguide thickness and revealing polarization-dependent light leakage.

Contribution

It introduces a method to generate and control exciton-polaritons in organic waveguides, advancing understanding of their emission and polarization properties at room temperature.

Findings

Polariton emission observed at room temperature.

Waveguide thickness controls polariton momentum.

Leakage cones exhibit radial and azimuthal polarization.

Abstract

We photo-excite slab polymer waveguides doped with J-aggregating dye molecules and measure the leaky emission from strongly coupled waveguide exciton polariton modes at room temperature. We show that the momentum of the waveguide exciton polaritons can be controlled by modifying the thickness of the excitonic waveguide. Non-resonantly pumped excitons in the slab excitonic waveguide decay into transverse electric and transverse magnetic strongly coupled exciton waveguide modes with radial symmetry. These leak to cones of light with radial and azimuthal polarizations.