Microscopic modelling of exciton-polariton diffusion coefficients in atomically thin semiconductors
arXiv:2203.00310 · doi:10.1103/PhysRevMaterials.6.034008
Abstract
In the strong light-matter coupling regime realized e.g. by integrating semiconductors into optical microcavities, polaritons as new hybrid light-matter quasi-particles are formed. The corresponding change in the dispersion relation has a large impact on optics, dynamics and transport behaviour of semiconductors. In this work, we investigate the strong-coupling regime in hBN-encapsulated MoSe monolayers focusing on exciton-polariton diffusion. Applying a microscopic approach based on the exciton density matrix formalism combined with the Hopfield approach, we predict a drastic increase of the diffusion coefficients by two to three orders of magnitude in the strong coupling regime. We explain this behaviour by the much larger polariton group velocity and suppressed polariton-phonon scattering channels with respect to the case of bare excitons. Our study contributes to a better microscopic understanding of polariton diffusion in atomically thin semiconductors.
arXiv comment10 pages, 4 figures
References in corpus (38)
- Excitons in atomically thin transition metal dichalcogenides
- Observation of giant bandgap renormalization and excitonic effects in a monolayer transition metal dichalcogenide semiconductor
- Polaritons in layered 2D materials
- Tightly bound excitons in monolayer WSe2
- Strong light-matter coupling in two-dimensional atomic crystals
- k.p theory for two-dimensional transition metal dichalcogenide semiconductors
- Lasing in topological edge states of a 1D lattice
- Exciton physics and device application of two-dimensional transition metal dichalcogenide semiconductors
- Excitonic linewidth approaching the homogeneous limit in MoS2 based van der Waals heterostructures : accessing spin-valley dynamics
- Exciton-polariton topological insulator
- All-optical polariton transistor
- Excitonic linewidth and coherence lifetime in monolayer transition metal dichalcogenides
- Exciton-polaritons in van der Waals heterostructures embedded in tunable microcavities
- Intrinsic Transport Properties of Electrons and Holes in Monolayer Transition Metal Dichalcogenides
- Two-dimensional semiconductors in the regime of strong light-matter coupling
- Exciton diffusion and halo effects in monolayer semiconductors
- Dark excitons in transition metal dichalcogenides
- Analytical approach to excitonic properties of MoS2
- Quantum correlations of confined exciton-polaritons
- Phonon Sidebands in Transition Metal Dichalcogenides
- Phonon-assisted Photoluminescence from Dark Excitons in Monolayers of Transition Metal Dichalcogenides
- Exciton diffusion in WSe2 monolayers embedded in a van der Waals heterostructure
- Exciton diffusion in monolayer semiconductors with suppressed disorder
- Bosonic condensation of exciton-polaritons in an atomically thin crystal
- Exciton Relaxation Cascade in Two-dimensional Transition-metal dichalcogenides
- Exciton propagation and halo formation in two-dimensional materials
- Realization of all-optical vortex switching in exciton-polariton condensates
- Long Range Ballistic Motion and Coherent Flow of Long Lifetime Polaritons
- Motional narrowing, ballistic transport, and trapping of room-temperature exciton polaritons in an atomically-thin semiconductor
- Nonclassical Exciton Diffusion in Monolayer WSe2
- Mapping of the dark exciton landscape in transition metal dichalcogenides
- Negative excitonic diffusion in transition metal dichalcogenides
- Phonon wind and drag of excitons in monolayer semiconductors
- Highly Confined In-plane Exciton-Polaritons in Monolayer Semiconductors
- Monolayer MoSe2: A candidate for room temperature polaritonics
- Theory of absorption lineshape in monolayers of transition metal dichalcogenides
- Phonon signatures in spectra of exciton polaritons in transition metal dichalcogenides
- Towards room-temperature superfluidity of exciton polaritons in an optical microcavity with an embedded MoS monolayer
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- Twist Angle Tuning of Moiré Exciton Polaritons in van der Waals Heterostructures
- Circumventing the polariton bottleneck via dark excitons in 2D semiconductors
- Signatures of dark excitons in exciton-polariton optics of transition metal dichalcogenides
- Microscopic Theory of Polaron-Polariton Dispersion and Propagation
- Two dimensional semiconductors: optical and electronic properties
- Polariton transport in 2D semiconductors: Phonon-mediated transitions between ballistic, superdiffusive and exciton-limited regimes
- Engineering strong coupling in ultra-compact photonic crystal/2D material platforms