Second harmonic generation control in twisted bilayers of transition metal dichalcogenides
arXiv:2110.08095 · doi:10.1103/PhysRevB.105.115420
Abstract
The twist angle in transition metal dichalcogenide (TMD) heterobilayers is a compelling degree of freedom that determines electron correlations and the period of lateral confinement of moiré excitons. Here we perform polarization-resolved second harmonic generation (SHG) spectroscopy of MoS2/WSe2 heterostructures. We demonstrate that by choosing suitable laser energies the twist angle between two monolayers can be measured directly on the assembled heterostructure. We show that the amplitude and polarization of the SHG signal from the heterostructure are determined by the twist angle between the layers and exciton resonances at the SH energy. For heterostructures with close to zero twist angle, we observe changes of exciton resonance energies and the appearance of new resonances in the linear and non-linear susceptibilities.
arXiv commentmain text and supplement
References in corpus (44)
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Ultrafast Charge Transfer in Atomically Thin MoS2/WS2 Heterostructures
- Signatures of moiré-trapped valley excitons in MoSe/WSe heterobilayers
- Observation of Moiré Excitons in WSe2/WS2 Heterostructure Superlattices
- k.p theory for two-dimensional transition metal dichalcogenide semiconductors
- Resonantly hybridised excitons in moiré superlattices in van der Waals heterostructures
- Excitonic linewidth approaching the homogeneous limit in MoS2 based van der Waals heterostructures : accessing spin-valley dynamics
- Abundance of correlated insulating states at fractional fillings of WSe/WS moiré superlattices
- Non-linear Optical Spectroscopy of Excited Exciton States for Efficient Valley Coherence Generation in WSe2 Monolayers
- Moiré excitons: from programmable quantum emitter arrays to spin-orbit coupled artificial lattices
- Evidence of high-temperature exciton condensation in 2D atomic double layers
- Electrical Control of Second-Harmonic Generation in a WSe2 Monolayer Transistor
- Giant and nonreciprocal second harmonic generation from layered antiferromagnetism in bilayer CrI3
- Atomic reconstruction in twisted bilayers of transition metal dichalcogenides
- Moiré superlattice in a MoSe/hBN/MoSe heterostructure: from coherent coupling of inter- and intra-layer excitons to correlated Mott-like states of electrons
- Relaxation and Domain Formation in Incommensurate 2D Heterostructures
- Magneto-Optics of Exciton Rydberg States in a Monolayer Semiconductor
- Momentum-space indirect interlayer excitons in transition metal dichalcogenide van der Waals heterostructures
- Optical imaging of strain in two-dimensional crystals
- Imaging moiré flat bands in 3D reconstructed WSe2/WS2 superlattices
- Moiré Excitons Correlated with Superlattice Structure in Twisted WSe/WSe Homobilayers
- Efficient photo-induced second harmonic generation in silicon photonics
- Nonlinear twistoptics at symmetry-broken interfaces
- Interlayer excitons in bilayer MoS2 with strong oscillator strength up to room temperature
- All-optical polarization and amplitude modulation of second-harmonic generation in atomically thin semiconductors
- Directional Interlayer Spin-Valley Transfer in Two-Dimensional Heterostructures
- Controlling interlayer excitons in MoS2 layers grown by chemical vapor deposition
- Optical spectroscopy of excited exciton states in MoS2 monolayers in van der Waals heterostructures
- Quantum interference in second-harmonic generation from monolayer WSe2
- Quantum-Confined Electronic States arising from Moiré Pattern of MoS2-WSe2 Hetero-bilayers
- Guide to optical spectroscopy of layered semiconductors
- Exciton states in monolayer MoSe2: impact on interband transitions
- Condensation signatures of photogenerated interlayer excitons in a van der Waals heterostack
- Intrinsic exciton states mixing and non-linear optical properties in transition metal dichalcogenide monolayers
- Second harmonic generation spectroscopy of excitons in ZnO
- Moiré and beyond in transition metal dichalcogenide twisted bilayers
- Flatbands and Mechanical Deformation Effects in the Moiré Superlattice of MoS-WSe Heterobilayers
- Twist-angle engineering of excitonic quantum interference and optical nonlinearities in stacked 2D semiconductors
- Second- and third-order optical susceptibilities in bidimensional semiconductors near excitons states
- Second-Harmonic Young Interference in Atom-Thin Heterocrystals
- Key role of the moire potential for the quasi-condensation of interlayer excitons in van der Waals heterostructures
- Exciton spectroscopy of semiconductors by the method of optical harmonics generation
- Interaction effects and superconductivity signatures in twisted double-bilayer WSe
- Moiré-localized interlayer exciton wavefunctions captured by imaging its electron and hole constituents
Cited by in corpus (14)
- Parametric Nonlinear Optics with Layered Materials and Related Heterostructures
- Nonlinear Dispersion Relation and Out-of-Plane Second Harmonic Generation in MoSSe and WSSe Janus Monolayers
- Nonlinear optics in 2D materials: from classical to quantum
- Probing Dark Excitons in Monolayer MoS by NonLinear Two-Photon Spectroscopy
- Exciton-Sensitized Second-Harmonic Generation in 2D Heterostructures
- Highly tunable moiré superlattice potentials in twisted hexagonal boron nitrides
- Second harmonic generation due to spatial structure of radiation beam
- Review: Advanced characterization of the spatial variation of moiré heterostructures and moiré excitons
- Two dimensional semiconductors: optical and electronic properties
- Electrically tunable and enhanced nonlinearity of moiré exciton-polaritons in transition metal dichalcogenide bilayers
- Magnetic quadrupole dichroism in isotropic medium
- Silicon nanoantennas for tailoring the optical properties of MoS2 monolayers
- Determining the complex second-order optical susceptibility in macroscale van der Waals heterobilayers
- Dual-Polarization SHG Interferometry for Imaging Antiparallel Domains and Stacking Angles of 2D Heterocrystals