Many-body effects of a two-dimensional electron gas on trion-polaritons

Abstract

We theoretically investigate the trion-polariton and the effects of a two-dimensional electron gas on its single particle properties. Focussing on the trion and exciton transitions, we set up an effective model and calculate the optical absorption of the quantum well containing the 2DEG. Including the light-matter coupling, we compute the Rabi splitting and polariton lineshapes as a function of 2DEG density. The role of finite temperature is investigated. The spatial extent of the trion-polariton is also calculated. We find a substantial charge build-up at short distances as long as the Rabi frequency does not exceed the trion binding energy. All our calculations take into account the Fermi-edge singularity and the Anderson orthogonality catastrophe.

arXiv comment10 pages, 7 figures

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• Quantum Dynamics of Attractive and Repulsive Polarons in a Doped MoSe${}_2$ Monolayer
• Many-body theory of optical absorption in doped two-dimensional semiconductors
• Fermi-edge exciton-polaritons in doped semiconductor microcavities with finite hole mass
• Crossover from exciton polarons to trions in doped two-dimensional semiconductors at finite temperature
• Trion resonance in polariton-electron scattering
• Way to observe the implausible "trion-polariton"
• Valley-mediated singlet- and triplet-polaron interactions and quantum dynamics in a doped WSe${}_2$ monolayer
• Spectra of heavy polarons and molecules coupled to a Fermi sea