Interlayer exciton polaritons in homobilayers of transition metal dichalcogenides
arXiv:2212.02839 · doi:10.1088/2053-1583/acc1f5
Abstract
Transition metal dichalcogenides integrated within a high-quality microcavity support well-defined exciton polaritons. While the role of intralayer excitons in 2D polaritonics is well studied, interlayer excitons have been largely ignored due to their weak oscillator strength. Using a microscopic and material-realistic Wannier-Hopfield model, we demonstrate that MoS homobilayers in a Fabry-Perot cavity support polaritons that exhibit a large interlayer exciton contribution, while remaining visible in linear optical spectra. Interestingly, with suitable tuning of the cavity length, the hybridization between intra- and interlayer excitons can be 'unmixed' due to the interaction with photons. We predict formation of polaritons where > 90% of the total excitonic contribution is stemming from the interlayer exciton. Furthermore, we explore the conditions on the tunneling strength and exciton energy landscape to push this to even 100%. Despite the extremely weak oscillator strength of the underlying interlayer exciton, optical energy can be effectively fed into the polaritons once the critical coupling condition of balanced radiative and scattering decay channels is met. These findings have a wide relevance for fields ranging from nonlinear optoelectronic devices to Bose-Einstein condensation.
Main text: 19 pages, 5 figures Supplementary information: 8 pages, 6 figures
References in corpus (18)
- Observation of Long-Lived Interlayer Excitons in Monolayer MoSe2-WSe2 Heterostructures
- Strong interlayer coupling in van der Waals heterostructures built from single-layer chalcogenides
- Resonantly hybridised excitons in moiré superlattices in van der Waals heterostructures
- Interlayer Exciton Optoelectronics in a 2D Heterostructure p-n Junction
- Ultrafast transition between exciton phases in van der Waals heterostructures
- Van der Waals Heterostructure Polaritons with moiré-Induced Nonlinearity
- Analysis of the exciton-exciton interaction in semiconductor quantum wells
- Formation of moiré interlayer excitons in space and time
- Tunable Phases of Moiré Excitons in van der Waals Heterostructures
- Excitonic transport driven by repulsive dipolar interaction in a van der Waals heterostructure
- Highly nonlinear dipolar exciton-polaritons in bilayer MoS
- Hybridized intervalley moiré excitons and flat bands in twisted WSe bilayers
- Exciton optics, dynamics and transport in atomically thin semiconductors
- Exciton landscape in van der Waals heterostructures
- Effective interaction and condensation of dipolaritons in coupled quantum wells
- Twist Angle Tuning of Moiré Exciton Polaritons in van der Waals Heterostructures
- Electrical tuning of moiré excitons in MoSe bilayers
- Valley-exchange coupling probed by angle-resolved photoluminescence