Proximity-induced chiral quantum light generation in strain-engineered WSe2/NiPS3 heterostructures

Li, Xiangzhi; Jones, Andrew Crandall; Choi, Junho; Zhao, Huan; Chandrasekaran, Vigneshwaran; Pettes, Michael Thompson; Piryatinski, Andrei; Tschudin, Märta A.; Reiser, Patrick; Broadway, David A.; Maletinsky, Patrick; Sinitsyn, Nikolai; Crooker, Scott A.; Htoon, Han

doi:10.1038/s41563-023-01645-7

Proximity-induced chiral quantum light generation in strain-engineered WSe₂/NiPS₃ heterostructures

Journal Article · Thu Aug 17 00:00:00 EDT 2023 · Nature Materials

DOI:https://doi.org/10.1038/s41563-023-01645-7· OSTI ID:2005835

^[1]; Jones, Andrew Crandall ^[1]; ^[1]; ^[1]; ^[1]; ^[1]; ^[1]; ^[2]; ^[2]; Broadway, David A. ^[2]; ^[2]; ^[1]; ^[1]; ^[1]

Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Univ. of Basel (Switzerland)

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 WSe₂/NiPS₃ 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. In this study, 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 WSe₂ monolayer and the out-of-plane magnetization of defects in the antiferromagnetic order of NiPS₃, both of which are co-localized by strain fields associated with the nanoscale indentations.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Science Foundation (NSF)

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 2005835

Report Number(s):: LA-UR--22-20519

Journal Information:: Nature Materials, Journal Name: Nature Materials Vol. 22; ISSN 1476-1122

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

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