A room-temperature moiré interlayer exciton laser
arXiv:2302.01266 · doi:10.1038/s41467-024-53083-x
Abstract
Moiré superlattices in van der Waals heterostructures offer highly tunable quantum systems with emergent electronic and excitonic properties such as superconductivity, topological edge states, and moiré-trapped excitons. Theoretical calculations predicted the existence of the moiré potential at elevated temperatures; however, its impact on the optical properties of interlayer excitons (IXs) at room temperature is lacking, and the benefits of the moiré effects for lasing applications remain unexplored. We report that the moiré potential in a molybdenum disulfide/tungsten diselenide (MoS2/WSe2) heterobilayer system can significantly enhance light emission, elongate the IX lifetime, and modulate the IX emission energy at room temperature. By integrating a moiré superlattice with a silicon topological nanocavity, we achieve ultra-low-threshold lasing at the technologically important telecommunication O-band thanks to the significant moiré modulation. Moreover, the high-quality topological nanocavities facilitate the highest spectral coherence of < 0.1 nm linewidth among all reported two-dimensional material-based laser systems. Our findings not only open a new avenue for studying correlated states at elevated temperatures, but also enable novel architectures for integrated on-chip photonics and optoelectronics.
References in corpus (30)
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Moire bands in twisted double-layer graphene
- Evolution of Electronic Structure in Atomically Thin Sheets of WS2 and WSe2
- Moiré Excitons in Van der Waals Heterostructures
- Signatures of moiré-trapped valley excitons in MoSe/WSe heterobilayers
- Observation of Moiré Excitons in WSe2/WS2 Heterostructure Superlattices
- Commensurate-incommensurate transition for graphene on hexagonal boron nitride
- Resonantly hybridised excitons in moiré superlattices in van der Waals heterostructures
- Moiré excitons: from programmable quantum emitter arrays to spin-orbit coupled artificial lattices
- Evidence of high-temperature exciton condensation in 2D atomic double layers
- Moiré heterostructures as a condensed matter quantum simulator
- Fast pick up technique for high quality heterostructures of bilayer graphene and hexagonal boron nitride
- Topological photonic crystal nanocavity laser
- Ultrafast transition between exciton phases in van der Waals heterostructures
- Van der Waals Heterostructure Polaritons with moiré-Induced Nonlinearity
- Imaging moiré flat bands in 3D reconstructed WSe2/WS2 superlattices
- Interlayer Exciton Laser with Extended Spatial Coherence in an Atomically-Thin Heterostructure
- Twist Angle Dependent Interlayer Exciton Lifetimes in van der Waals Heterostructures
- Formation of moiré interlayer excitons in space and time
- Emission from quantum-dot high- microcavities: transition from spontaneous emission to lasing and the effects of superradiant emitter coupling
- Hyperspectral imaging of excitons within a moiré unit-cell with a sub-nanometer electron probe
- Biaxial versus uniaxial strain tuning of single-layer MoS
- Rotational and Dilational Reconstruction in Transition Metal Dichalcogenide Moiré Bilayers
- Layer engineered interlayer excitons
- Localization and interaction of interlayer excitons in MoSe/WSe heterobilayers
- Lasing of Moiré Trapped MoSe/WSe Interlayer Excitons Coupled to a Nanocavity
- Bosonic Delocalization of Dipolar Moiré Excitons
- Optical signature of cascade transitions between moiré interlayer excitons
- Harmonic to anharmonic tuning of moiré potential leading to unconventional Stark effect and giant dipolar repulsion in WS/WSe heterobilayer
- Impact of atomic reconstruction on optical spectra of twisted TMD homobilayers
Cited by in corpus (4)
- Atomically-Thin Transition Metal Dichalcogenide Nanolasers: Challenges and Opportunities
- Light-matter interactions in layered materials and heterostructures: from moiré physics and magneto-optical effects to ultrafast dynamics and hybrid meta-photonics
- First-Principles Insights into Excitonic and Electron-Phonon Effects in van der Waals Heterostructures
- Robust Interlayer Exciton Interplay in Twisted van der Waals Heterotrilayer on a Broadband Bragg Reflector up to Room Temperature