Tunability of Robust Exciton-Trion Polaritons in Atomically Thin WS2 Monolayers

2025/06/08 by Xuguang Cao, Debao Zhang, Cao, Xuguang +15
Engineering · Materials Science · Physics and Astronomy · #2D Materials and Applications #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Plasmonic and Surface Plasmon Research #Strong Light-Matter Interactions

paper · pdf · doi:10.48550/arxiv.2506.07030

openalex publication_date 2025/06/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Herein, we present an experimental demonstration of the robust exciton-trion polaritons (ETPs) by measuring and simulating the resonance reflectance spectra of various configurational WS2 monolayers with different dielectric screenings. Moreover, the oscillator strength and decoherent behavior of such hybrid ETPs can be tuned via utilizing dielectric screening effect. The effect is attributed to the regulation of the Coulomb coupling between excitons and trions by changing the surrounding dielectric constant. The demonstration and tunability of the robust ETPs offers a novel pathway for researching novel phases of quantum matter in a quantum many-body physics regime.

Citations

• Many-body correlations and excitonic effects in semiconductor spectroscopy

Related

• Control over cavity exciton polaritons in monolayer semiconductors
• Enhanced polariton interactions in suspended WS2 monolayer microcavity
• Observation and active control of a collective polariton mode and polaritonic band gap in few-layer WS2 strongly coupled with plasmonic lattices
• Strong coupling of monolayer WS2 excitons and surface plasmon polaritons in a planar Ag/WS2 hybrid structure
• Cavity-mediated exciton hopping in a dielectrically engineered polariton system