Indirect excitons in a potential energy landscape created by a perforated electrode

TL;DR

This paper demonstrates a device that directs indirect excitons along a potential gradient created by a perforated electrode, showing transport control influenced by exciton density and interactions.

Contribution

It introduces a novel excitonic device utilizing electrode density gradients to control exciton transport, with experimental validation.

Findings

Transport distance increases with exciton density

Disorder screening enhances exciton mobility

Device proves principle of exciton transport control

Abstract

We report on the principle and realization of an excitonic device: a ramp that directs the transport of indirect excitons down a potential energy gradient created by a perforated electrode at constant voltage. The device provides an experimental proof of principle for controlling exciton transport with electrode density gradients. We observed that the exciton transport distance along the ramp increases with increasing exciton density. This effect is explained in terms of disorder screening by repulsive exciton-exciton interactions.