Photonic Architectures for Equilibrium High-Temperature Bose-Einstein Condensation in Dichalcogenide Monolayers

Abstract

Semiconductor-microcavity polaritons are composite quasiparticles of excitons and photons, emerging in the strong coupling regime. As quantum superpositions of matter and light, polaritons have much stronger interparticle interactions compared with photons, enabling rapid equilibration and Bose-Einstein condensation (BEC). Current realizations based on 1D photonic structures, such as Fabry-Pérot microcavities, have limited light-trapping ability resulting in picosecond polariton lifetime. We demonstrate, theoretically, above-room-temperature (up to 590 K) BEC of long-lived polaritons in MoSe${}_2$ monolayers sandwiched by simple TiO${}_2$ based 3D photonic band gap (PBG) materials. The 3D PBG induces very strong coupling of 40 meV (Rabi splitting of 62 meV) for as few as three dichalcogenide monolayers. Strong light-trapping in the 3D PBG enables the long-lived polariton superfluid to be robust against fabrication-induced disorder and exciton line-broadening.

References in corpus (11)

• Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
• Control of valley polarization in monolayer MoS2 by optical helicity
• Valley polarization in MoS2 monolayers by optical pumping
• Observation of giant bandgap renormalization and excitonic effects in a monolayer transition metal dichalcogenide semiconductor
• Electrical Control of Two-Dimensional Neutral and Charged Excitons in a Monolayer Semiconductor
• Strong light-matter coupling in two-dimensional atomic crystals
• Intrinsic Transport Properties of Electrons and Holes in Monolayer Transition Metal Dichalcogenides
• Controlling the Spontaneous Emission Rate of Monolayer MoS${}_2$ in a Photonic Crystal Nanocavity
• Control of Two-Dimensional Excitonic Light Emission via Photonic Crystal
• Ultrafast tristable spin memory of a coherent polariton gas
• Photonic Crystal Architecture for Room Temperature Equilibrium Bose-Einstein Condensation of Exciton-Polaritons

Cited by in corpus (8)

• Exciton-polaritons in van der Waals heterostructures embedded in tunable microcavities
• Cavity nonlinear optics with layered materials
• Prediction of hyperbolic exciton-polaritons in monolayer black phosphorus
• Monolayer MoSe2: A candidate for room temperature polaritonics
• Towards room-temperature superfluidity of exciton polaritons in an optical microcavity with an embedded MoS${}_2$ monolayer
• Quantum many-body simulation using monolayer exciton-polaritons in coupled-cavities
• Polariton condensation in photonic crystals with high molecular orientation
• 3D $Z_2$ Topological Nodes in Nonsymmorphic Photonic Crystals: Ultrastrong Coupling and Anomalous Refraction