Electrical control of hybrid exciton transport in a van der Waals heterostructure

Abstract

Interactions between out-of-plane dipoles in bosonic gases enable the long-range propagation of excitons. The lack of direct control over collective dipolar properties has hitherto limited the degrees of tunability and the microscopic understanding of exciton transport. In this work, we modulate the layer hybridization and interplay between many-body interactions of excitons in a van der Waals heterostructure with an applied vertical electric field. By performing spatiotemporally resolved measurements supported by microscopic theory, we uncover the dipole-dependent properties and transport of excitons with different degrees of hybridization. Moreover, we find constant emission quantum yields of the transporting species as a function of excitation power with dominating radiative decay mechanisms over nonradiative ones, a fundamental requirement for efficient excitonic devices. Our findings provide a complete picture of the many-body effects in the transport of dilute exciton gases and have crucial implications for the study of emerging states of matter, such as Bose-Einstein condensation, as well as for optoelectronic applications based on exciton propagation.

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Cited by in corpus (25)

• Localization and interaction of interlayer excitons in MoSe${}_2$/WSe${}_2$ heterobilayers
• Ultrafast dynamics of bright and dark excitons in monolayer WSe${}_2$ and heterobilayer WSe${}_2$/MoS${}_2$
• Nonlinear optics in 2D materials: from classical to quantum
• Transport and localization of indirect excitons in a van der Waals heterostructure
• Excitonic signatures of ferroelectric order in parallel-stacked MoS${}_2$
• Bright dipolar excitons in twisted black phosphorus homostructures
• Electrically tunable dipolar interactions between layer-hybridized excitons
• Impact of atomic reconstruction on optical spectra of twisted TMD homobilayers
• Quadrupolar Excitons in MoSe${}_2$ Bilayers
• 2D material exciton-polariton transport on 2D photonic crystals
• Spatiotemporal dynamics of moiré excitons in van der Waals heterostructures
• Electrically Controlled Interfacial Charge Transfer Induced Excitons in MoSe2-WSe2 Lateral Heterostructure
• Optical Signatures of Moiré Trapped Biexcitons
• Hybrid moiré excitons and trions in twisted MoTe${}_2$-MoSe${}_2$ heterobilayers
• Electrically tunable layer-hybridized trions in doped WSe${}_2$ bilayers
• Excitonic thermalization bottleneck in twisted TMD heterostructures
• Electromagnetic field assisted exciton diffusion in moiré superlattices
• Impact of charge transfer excitons on unidirectional exciton transport in lateral TMD heterostructures
• Two dimensional semiconductors: optical and electronic properties
• Viscous hydrodynamics of excitons in van der Waals heterostructures
• Exciton fractional Chern insulators in moiré heterostructures
• Polariton transport in 2D semiconductors: Phonon-mediated transitions between ballistic, superdiffusive and exciton-limited regimes
• Long-range spatial extension of exciton states in van der Waals heterostructure
• Sub-diffraction-resolved spatial distribution of emitting excitons in STM-induced luminescence of 2D semiconductors via Richardson-Lucy deconvolution
• Universal fragmentation in annihilation reactions with constrained kinetics