Non-Hermitian Polariton-photon Coupling in a Perovskite Open Microcavity

Overview

Journal Nanophotonics

Publisher De Gruyter

Date 2024 Dec 16

PMID 39678657

Authors

Mateusz Kedziora

Mateusz Krol

Piotr Kapuscinski

Helgi Sigurdsson

Rafal Mazur

Wiktor Piecek

Jacek Szczytko

Michal Matuszewski

Andrzej Opala

Barbara Pietka

Affiliations

Soon will be listed here.

Abstract

Exploring the non-Hermitian properties of semiconductor materials for optical applications is at the forefront of photonic research. However, the selection of appropriate systems to implement such photonic devices remains a topic of debate. In this work, we demonstrate that a perovskite crystal, characterized by its easy and low-cost manufacturing, when placed between two distributed Bragg reflectors with an air gap, can form a natural double microcavity. This construction shows promising properties for the realisation of novel, tunable non-Hermitian photonic devices through strong light-matter coupling. We reveal that such a system exhibits double-coupled polariton modes with dispersion including multiple inflection points. Owing to its non-Hermiticity, our system exhibits nonreciprocal properties and allows for the observation of exceptional points. Our experimental studies are in agreement with the theoretical analysis based on coupled mode theory and calculations based on transfer matrix method.

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