Single photon emitters with polarization and orbital angular momentum locking in monolayer semiconductors
arXiv:2301.12207 · doi:10.1021/acs.nanolett.3c00459
Abstract
Excitons in monolayer transition metal dichalcogenide are endowed with intrinsic valley-orbit coupling between their center-of-mass motion and valley pseudospin. When trapped in a confinement potential, e.g., generated by strain field, we find that intralayer excitons are valley and orbital angular momentum (OAM) entangled. By tuning trap profile and external magnetic field, one can engineer the exciton states at ground state, and realize a series of valley-OAM entangled states. We further show that the OAM of excitons can be transferred to emitted photons, and these novel exciton states can naturally serve as polarization-OAM locked single photon emitters, which under certain circumstance become polarization-OAM entangled, highly tunable by strain trap and magnetic field. Our proposal demonstrates a novel scheme to generate polarization-OAM locked/entangled photons at nanoscale with high degree of integrability and tunability, pointing to exciting opportunities for quantum information applications.
arXiv comment10 pages, 5 figures
References in corpus (25)
- Magnetic Control of Valley Pseudospin in Monolayer WSe2
- Quantum Entanglement of High Angular Momenta
- Large-scale quantum-emitter arrays in atomically thin semiconductors
- Moiré excitons: from programmable quantum emitter arrays to spin-orbit coupled artificial lattices
- Deterministic strain-induced arrays of quantum emitters in a two-dimensional semiconductor
- Atomic reconstruction in twisted bilayers of transition metal dichalcogenides
- Engineered Quantum Dot Single Photon Sources
- Topological Exciton Bands in Moiré Heterojunctions
- Bright excitons in monolayer transition metal dichalcogenides: from Dirac cones to Dirac saddle points
- Exciton Diamagnetic Shifts and Valley Zeeman Effects in Monolayer WS and MoS to 65 Tesla
- Nonanalyticity, Valley Quantum Phases, and Light-like Exciton Dispersion in Monolayer TMDs: Theory and First-Principles Calculations
- Irradiation of Nanostrained Monolayer WSe for Site-Controlled Single-Photon Emission up to 150 K
- One-Dimensional Moiré Excitons in Transition-Metal Dichalcogenide Heterobilayers
- Hundredfold Enhancement of Light Emission via Defect Control in Monolayer Transition-Metal Dichalcogenides
- Hybrid tip-enhanced nano-spectroscopy and -imaging of monolayer WSe2 with local strain control
- Radiative Lifetimes of Excitons and Trions in Monolayers of Metal Dichalcogenide MoS2
- Imaging moiré flat bands in 3D reconstructed WSe2/WS2 superlattices
- Theory of strain in single-layer transition metal dichalcogenides
- Localized inter-valley defect excitons as single-photon emitters in WSe
- Spin-orbit interaction of light induced by transverse spin angular momentum engineering
- On-Chip Spin-Orbit Controlled Excitation of Quantum Emitters Coupled to Hybrid Plasmonic Nanocircuits
- Universal superlattice potential for 2D materials from twisted interface inside h-BN substrate
- Strain-induced bound states in transition-metal dichalcogenide bubbles
- Two-dimensional excitons from twisted light and the fate of the photon's orbital angular momentum
- Numerical approach to the Schrodinger equation in momentum space