Exploring exciton-polaritons in coupled pillars at room temperature

Abstract

Exciton-polaritons, hybrid quasiparticles formed through the strong coupling of excitons and photons in microcavities, exhibit unique properties that combine light-like and matter- like characteristics. These features make them promising candidates for advancing photonic and optoelectronic technologies. While significant progress has been made in polaritonic research, much of it is constrained to cryogenic conditions, which limits practical applications. This study focuses on coupled pillar microcavities as a simplified and scalable platform for exploring polariton dynamics at room temperature. Using photoluminescence spectroscopy, we investigate polariton dispersion and different coupling regimes systematically. Our findings demonstrate that room-temperature systems can retain strong polariton interactions and tailored energy landscapes, providing critical insights into the design of polaritonic devices. By addressing the challenges associated with cryogenic operation, this work bridges fundamental research and technological innovation, paving the way for the practical realisation of polariton-based applications in ambient conditions.