Room-temperature quantum emission from interface excitons in mixed-dimensional heterostructures
arXiv:2307.15399 · doi:10.1038/s41467-024-47099-6
Abstract
The development of van der Waals heterostructures has introduced unconventional phenomena that emerge at atomically precise interfaces. For example, interlayer excitons in two-dimensional transition metal dichalcogenides show intriguing optical properties at low temperatures. Here we report on room-temperature observation of interface excitons in mixed-dimensional heterostructures consisting of two-dimensional tungsten diselenide and one-dimensional carbon nanotubes. Bright emission peaks originating from the interface are identified, spanning a broad energy range within the telecommunication wavelengths. The effect of band alignment is investigated by systematically varying the nanotube bandgap, and we assign the new peaks to interface excitons as they only appear in type-II heterostructures. Room-temperature localization of low-energy interface excitons is indicated by extended lifetimes as well as small excitation saturation powers, and photon correlation measurements confirm single-photon emission. With mixed-dimensional van der Waals heterostructures where band alignment can be engineered, new opportunities for quantum photonics are envisioned.
8 pages, 4 figures
References in corpus (25)
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
- Observation of Long-Lived Interlayer Excitons in Monolayer MoSe2-WSe2 Heterostructures
- Mixed-Dimensional van der Waals Heterostructures
- Signatures of moiré-trapped valley excitons in MoSe/WSe heterobilayers
- Observation of Moiré Excitons in WSe2/WS2 Heterostructure Superlattices
- A Diamond Nanowire Single Photon Antenna
- Irradiation of Nanostrained Monolayer WSe for Site-Controlled Single-Photon Emission up to 150 K
- One-Dimensional Moiré Excitons in Transition-Metal Dichalcogenide Heterobilayers
- Localized inter-valley defect excitons as single-photon emitters in WSe
- Design of van der Waals Interfaces for Broad-Spectrum Optoelectronics
- Correlated insulator of excitons in WSe2/WS2 moiré superlattices
- Excitons in mesoscopically reconstructed moiré heterostructures
- Synthetic Control over the Binding Configuration of Luminescent sp3-Defects in Single-Walled Carbon Nanotubes
- Exciton diffusion, end quenching, and exciton-exciton annihilation in individual air-suspended carbon nanotubes
- Layer engineered interlayer excitons
- Dark exciton optical spectroscopy of a semiconducting quantum dot embedded in a nanowire
- Room-temperature single photon emission from micron-long air-suspended carbon nanotubes
- Hexagonal boron nitride as an ideal substrate for carbon nanotube photonics
- Deterministic transfer of optical-quality carbon nanotubes for atomically defined technology
- Gate-controlled generation of optical pulse trains using individual carbon nanotubes
- Formation of Organic Color Centers in Air-Suspended Carbon Nanotubes Using Vapor-Phase Reaction
- Quantization of mode shifts in nanocavities integrated with atomically thin sheets
- Resonant exciton transfer in mixed-dimensional heterostructures for overcoming dimensional restrictions in optical processes
- Super-Resolution Fluorescence Imaging of Carbon Nanotubes Using a Nonlinear Excitonic Process