Temporal bandwidth of consecutive polariton condensation

TL;DR

This paper develops a microscopic theory to understand the limitations of the temporal separation of consecutive polariton condensates, highlighting the role of ballistic losses and achieving a bandwidth of around 240 GHz.

Contribution

It introduces a comprehensive microscopic model for polariton condensate dynamics, incorporating thermalisation, vibron-relaxation, and losses, and verifies predictions experimentally.

Findings

Ballistic losses limit the temporal bandwidth to ~240 GHz.

Theoretical model accurately predicts experimental results.

Lateral ballistic losses are crucial in defining the bandwidth limit.

Abstract

The advent of organic polaritonics has led to the realisation of all-optical transistors, logic gates, and single photon-switches operating at room temperature. In this Letter, we develop a microscopic theory accounting for thermalisation, vibron-relaxation, and radiative and ballistic polariton losses to investigate the intrinsic limitations of the temporal separation of consecutive polariton condensates. We test and verify our theoretical predictions using an optical pump-pump configuration with different pulse width and unravel the importance of lateral ballistic losses in defining the upper limit of the temporal bandwidth, reaching ~240 GHz.