Spatiotemporally Controlled Room Temperature Exciton Transport under Dynamic Pressure
arXiv:2108.06418 · doi:10.1038/s41566-021-00951-3
Abstract
Two-dimensional transition metal dichalcogenides (TMDs) provide an attractive platform for studying strain dependent exciton transport at room temperature due to large exciton binding energy and strong bandgap sensitivity to mechanical stimuli. Here, we use Rayleigh type surface acoustic wave (SAW) to demonstrate controlled and directional exciton transport under weak coupling regime at room temperature. We screen the in-plane piezoelectric field using photogenerated carriers to study transport under type-I bandgap modulation and measure a maximum exciton drift velocity of 600 m/s. Furthermore, we demonstrate precise steering of exciton flux by controlling the relative phase between the input RF excitation and exciton photogeneration. The results provide important insight into the weak coupling regime between dynamic strain wave and room temperature excitons in a 2D semiconductor system and pave way to exciting applications of excitonic devices in data communication and processing, sensing and energy conversion.
References in corpus (22)
- Boron nitride substrates for high-quality graphene electronics
- Giant Intrinsic Carrier Mobilities in Graphene and Its Bilayer
- Exciton Binding Energy and Nonhydrogenic Rydberg Series in Monolayer WS2
- Carrier transport in 2D graphene layers
- Mechanical Properties of Atomically Thin Boron Nitride and the Role of Interlayer Interactions
- Exciton physics and device application of two-dimensional transition metal dichalcogenide semiconductors
- Large-scale quantum-emitter arrays in atomically thin semiconductors
- Deterministic strain-induced arrays of quantum emitters in a two-dimensional semiconductor
- Dynamics and efficient conversion of excitons to trions in non-uniformly strained monolayer WS
- Direct exciton emission from atomically thin transition metal dichalcogenide heterostructures near the lifetime limit
- Dynamic exciton funneling by local strain control in a monolayer semiconductor
- Drift mobility of long-living excitons in coupled GaAs quantum wells
- Exciton propagation and halo formation in two-dimensional materials
- Electrostatic Conveyer for Excitons
- Impact of strain on the optical fingerprint of monolayer transition metal dichalcogenides
- Dynamics of indirect exciton transport by moving acoustic fields
- Strain dependence of photoluminescence and circular dichroism in transition metal dichalcogenides: a k.p analysis
- Dynamic local strain in graphene generated by surface acoustic waves
- Voltage-controlled long-range propagation of indirect excitons in van der Waals heterostructure
- Neutral and charged excitons interplay in non-uniformly strain-engineered WS
- Exciton diffusion in a hBN-encapsulated monolayer MoSe2
- High-mobility indirect excitons in wide single quantum well
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- Exciton optics, dynamics and transport in atomically thin semiconductors
- Room temperature wavelike exciton transport in a van der Waals superatomic semiconductor
- Extended spatial coherence of interlayer excitons in MoSe/WSe heterobilayers
- Transport and localization of indirect excitons in a van der Waals heterostructure
- Acousto-drag photovoltaic effect by piezoelectric integration of two-dimensional semiconductors
- Gate-tunable quantum acoustoelectric transport in graphene
- 2D material exciton-polariton transport on 2D photonic crystals
- Coherent detection of the oscillating acoustoelectric effect in graphene
- Impact of charge transfer excitons on unidirectional exciton transport in lateral TMD heterostructures
- Two dimensional semiconductors: optical and electronic properties
- Dynamic generation of spin spirals of moiré trapped carriers via exciton mediated spin interactions
- Ultrafast acoustic modulation of second-harmonic generation in monolayer transition metal dichalcogenides
- Signatures of valley drift in the diversified band dispersions of bright, gray, and dark excitons in MoS2 monolayers under uni-axial strains
- Strain-induced exciton mobility in layered WS2 from first principles
- Excitonic correlations in the system of gated metallic wires with the applied Zeeman magnetic field
- Impact of Electrical Contacts on Transition Metal Dichalcogenides-Based Acoustoelectric and Acousto-Photoelectric Devices