The interplay between excitons and trions in a monolayer of MoSe${}_2$

Abstract

We study the impact of a free carrier reservoir on the optical properties of excitonic and trionic complexes in a MoSe${}_2$ monolayer at cryogenic temperatures. By applying photodoping via a non-resonant pump laser the electron density can be controlled in our sample and in turn the exciton and trion densities can be tuned. We find a significant increase of the trion binding energy in the presence of an induced electron gas both in power- and in time-resolved photoluminescence spectra. This behaviour is reproduced within the original variational approach that takes into account both screening and phase space filling effects.

arXiv comment8 pages, 3 figures

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Cited by in corpus (10)

• Nonlinear quantum optics with trion-polaritons in 2D monolayers: conventional and unconventional photon blockade
• Spatial coherence of room-temperature monolayer WSe${}_2$ exciton-polaritons in a trap
• Modulation of trion and exciton formation in monolayer WS2 by dielectric and substrate engineering
• Tunable optical nonlinearity for TMD polaritons dressed by a Fermi sea
• A colloquium on the variational method applied to excitons in 2D materials
• Monolayer WS${}_2$ electro- and photo-luminescence enhancement by TFSI treatment
• Microscopic theory of exciton and trion polaritons in doped monolayers of transition metal dichalcogenides
• Tensile strain induced brightening of momentum forbidden dark exciton in WS${}_2$
• Modelling excitonic Mott transitions in two-dimensional semiconductors
• Electrical Control of Excitons in Bare-MoSe2 and MoSe2/NbSe2 Heterostructure