Proximity-induced chiral quantum light generation in strain-engineered WSe$_{2}$/NiPS$_{3}$ heterostructures

Quantum light emitters capable of generating single photons with circular polarization and non-classical statistics could enable non-reciprocal single-photon devices and deterministic spin–photon interfaces for quantum networks. To date, the emission of such chiral quantum light relies on the application of intense external magnetic fields, electrical/optical injection of spin-polarized carriers/excitons or coupling with complex photonic metastructures. Here we report the creation of free-space chiral quantum light emitters via the nanoindentation of monolayer WSe

_{2}

/NiPS

_{3}

heterostructures at zero external magnetic field. These quantum light emitters emit with a high degree of circular polarization (0.89) and single-photon purity (95%), independent of pump laser polarization. Scanning diamond nitrogen-vacancy microscopy and temperature-dependent magneto-photoluminescence studies reveal that the chiral quantum light emission arises from magnetic proximity interactions between localized excitons in the WSe

_{2}

monolayer and the out-of-plane magnetization of defects in the antiferromagnetic order of NiPS

_{3}

, both of which are co-localized by strain fields associated with the nanoscale indentations.

Note:

20 pages,4 figures

Quantum optics
Two-dimensional materials

References(42)

Figures(0)

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Proximity-induced chiral quantum light generation in strain-engineered WSe2_{2}2​/NiPS3_{3}3​ heterostructures

Citations per year

Proximitized materials

Room-temperature electron spin polarization exceeding 90% in an opto-spintronic semiconductor nanostructure via remote spin filtering

Magnetic proximity effects in transition-metal dichalcogenides: converting excitons

Enhanced valley splitting in monolayer WSe2_{2}2​ due to magnetic exchange field

Magnetic proximity coupling of quantum emitters in WSe2_{2}2​ to van der Waals ferromagnets

Observation of magnetic proximity effect using resonant optical spectroscopy of an electrically tunable MoSe2_{2}2​/CrBr3_{3}3​ heterostructure

Layer-resolved magnetic proximity effect in van der Waals heterostructures

Van der Waals engineering of ferromagnetic semiconductor heterostructures for spin and valleytronics

Antiferromagnetic proximity coupling between semiconductor quantum emitters in WSe2_{2}2​ and van der Waals ferromagnets

Spin-orbit coupling proximity effect in MoS2_{2}2​/Fe3_{3}3​GeTe2_{2}2​ heterostructures

Light-valley interactions in 2D semiconductors

Magnetic control of valley pseudospin in monolayer WSe2_{2}2​

Ultrafast spin-lasers

Signatures of moiré-trapped valley excitons in MoSe2_{2}2​/WSe2_{2}2​ heterobilayers

Evidence for moiré excitons in van der Waals heterostructures

Chiral single-photon generators

Chiral quantum optics

Intrinsic van der Waals magnetic materials from bulk to the 2D limit: new frontiers of spintronics

Charge-spin correlation in van der Waals antiferromagnet NiPS3_{3}3​

Coherent many-body exciton in van der Waals antiferromagnet NiPS3_{3}3​

Spin-induced linear polarization of photoluminescence in antiferromagnetic van der Waals crystals

Highly anisotropic excitons and multiple phonon bound states in a van der Waals antiferromagnetic insulator

Imaging the Néel vector switching in the monolayer antiferromagnet MnPSe3_{3}3​ with strain-controlled Ising order