Exciton-Polariton Flows in Cross-Dimensional Junctions

TL;DR

This paper investigates exciton-polariton flow dynamics in cross-dimensional junctions, revealing mode selection and tunable propagation through experimental spectroscopy and Ginzburg-Landau modeling.

Contribution

It introduces a novel experimental setup to study exciton-polariton transmission across different dimensional junctions with detailed theoretical support.

Findings

Mode selection depends on pump laser position.

Propagation from localized states can be tuned.

Theoretical modeling explains transmission mechanisms.

Abstract

We study the nonequilibrium exciton-polariton condensation in 1D to 0D and 1D to 2D junctions by means of non-resonant spectroscopy. The shape of our potential landscape allows to probe the resonant transmission of a propagating condensate between a quasi-1D waveguide and cylindrically symmetric states. We observe a distinct mode selection by varying the position of the non-resonant pump laser. Moreover, we study the the case of propagation from a localized trapped condensate state into a waveguide channel. Here, the choice of the position of the injection laser allows us to tune the output in the waveguide. Our measurements are supported by an accurate Ginzburg-Landau modeling of the system shining light on the underlying mechanisms.