Observation of anomalous exciton polariton bands in PEPI perovskite based microcavity at room temperature

TL;DR

This paper reports the observation of unusual exciton polariton bands in PEPI perovskite microcavities at room temperature, highlighting the role of non-Hermiticity and matching experimental results with a theoretical model.

Contribution

It presents the first experimental observation of anomalous polariton bands in perovskite microcavities and introduces a non-Hermitian coupled oscillator model that accurately describes these phenomena.

Findings

Observation of anomalous exciton polariton bands at room temperature

Successful simulation of band structure using non-Hermitian model

Agreement between experimental data and theoretical predictions

Abstract

Recently anomalous energy bands with negative mass attract intensive attention where non Hermiticity plays an important role. In this work we observe anomalous exciton polariton bands in PEPI perovskite based microcavity at room temperature. We simulate the anomalous band structure using a non-Hermitian coupled oscillator model which agree with experiments very well. Our results offer to study non-Hermitian polariton wave dynamics at room temperature.