Proximity-induced chiral quantum light generation in strain-engineered WSe 2 /NiPS 3 heterostructures.

Autor: Li X; Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, USA., Jones AC; Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, USA., Choi J; National High Magnetic Field Laboratory, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, USA., Zhao H; Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, USA., Chandrasekaran V; Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, USA., Pettes MT; Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, USA., Piryatinski A; Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, USA., Tschudin MA; Department of Physics, University of Basel, Basel, Switzerland., Reiser P; Department of Physics, University of Basel, Basel, Switzerland., Broadway DA; Department of Physics, University of Basel, Basel, Switzerland., Maletinsky P; Department of Physics, University of Basel, Basel, Switzerland., Sinitsyn N; Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, USA., Crooker SA; National High Magnetic Field Laboratory, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, USA., Htoon H; Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, USA. htoon@lanl.gov.
Jazyk: angličtina
Zdroj: Nature materials [Nat Mater] 2023 Nov; Vol. 22 (11), pp. 1311-1316. Date of Electronic Publication: 2023 Aug 17.
DOI: 10.1038/s41563-023-01645-7
Abstrakt: 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.
(© 2023. The Author(s), under exclusive licence to Springer Nature Limited.)
Databáze: MEDLINE
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