Cavity exciton-polaritons in two-dimensional semiconductors from first principles
arXiv:2105.05591 · doi:10.1103/PhysRevResearch.3.L032056
Abstract
Two-dimensional (2D) semiconducting microcavity, where exciton-polaritons can be formed, constitues a promising setup for exploring and manipulating various regimes of light-matter interaction. Here, the coupling between 2D excitons and metallic cavity photons is studied by using first-principles propagator technique. The strength of exciton-photon coupling is characterised by its Rabi splitting to two exciton-polaritons, which can be tuned by cavity thickness. Maximum splitting of 128 meV is achieved in phosporene cavity, while remarkable value of about 440 meV is predicted in monolayer hBN device. The obtained Rabi splittings in WS microcavity are in excellent agreement with the recent experiments. Present methodology can aid in predicting and proposing potential setups for trapping robust 2D exciton-polariton condensates.
6 pages, 5 figures
References in corpus (13)
- Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
- Measurement of the optical dielectric function of transition metal dichalcogenide monolayers: MoS2, MoSe2, WS2 and WSe2
- Strong light-matter coupling in two-dimensional atomic crystals
- Probing Excitonic Dark States in Single-layer Tungsten Disulfide
- Observation of Superfluidity of Polaritons in Semiconductor Microcavities
- Quantised Vortices in an Exciton-Polariton Fluid
- Exciton Binding Energy of Monolayer WS2
- Spontaneous Polarisation Build up in a Room Temperature Polariton Laser
- Optical properties of bulk semiconductors and graphene/boron-nitride: The Bethe-Salpeter equation with derivative discontinuity-corrected DFT energies
- Highly excited exciton-polariton condensates
- Enhanced nonlinear interaction of polaritons via excitonic Rydberg states in monolayer WSe2
- Microscopic Theory of Equilibrium Polariton Condensates
- Determination of oscillator strength of confined excitons in a semiconductor microcavity