Experimental realization of a polariton beam amplifier

TL;DR

This paper demonstrates a new planar cavity polariton beam amplifier using non-resonant excitation, achieving significant amplification without beam distortion by compensating background carrier-induced potentials.

Contribution

It introduces a novel polariton beam amplification method employing non-resonant excitation and cavity engineering to enhance gain and control beam quality.

Findings

Significant polariton beam amplification achieved

Background carriers provide gain and potential control

Amplification occurs without beam distortion

Abstract

In this report we demonstrate a novel concept for a planar cavity polariton beam amplifier using non-resonant excitation. In contrast to resonant excitation schemes, background carriers are injected which form excitons, providing both gain and a repulsive potential for a polariton condensate. Using an attractive potential environment induced by a locally elongated cavity layer, the repulsive potential of the injected background carriers is compensated and a significant amplification of polariton beams is achieved without beam distortion.