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arXiv · 2107.06927

Microscopic theory of exciton and trion polaritons in doped monolayers of transition metal dichalcogenides

Y. V. Zhumagulov·S. Chiavazzo·D. R. Gulevich·V. Perebeinos·I. A. Shelykh·O. Kyriienko
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Abstract

We study a doped transition metal dichalcogenide (TMDC) monolayer in an optical microcavity. Using the microscopic theory, we simulate spectra of quasiparticles emerging due to the interaction of material excitations and a high-finesse optical mode, providing a comprehensive analysis of optical spectra as a function of Fermi energy and predicting several modes in the strong light-matter coupling regime. In addition to exciton-polaritons and trion-polaritons, we report polaritonic modes that become bright due to the interaction of excitons with free carriers. At large doping, we reveal strongly coupled modes corresponding to excited trions that hybridize with a cavity mode. We also demonstrate that rising the carrier concentration enables to change the nature of the system's ground state from the dark to the bright one. Our results offer a unified description of polaritonic modes in a wide range of free electron densities.

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Y. V. Zhumagulov, S. Chiavazzo, D. R. Gulevich, V. Perebeinos, I. A. Shelykh, O. Kyriienko. 2021-07-14. Microscopic theory of exciton and trion polaritons in doped monolayers of transition metal dichalcogenides. https://doi.org/10.1038/s41524-022-00775-x

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