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Quantum light sources, especially single-photon emitters, are pivotal for advancing quantum technologies. Despite extensive studies, the emission from detects-localized excitons in monolayer WSe2 under external perturbations, such as magnetic fields, remains underexplored. Herein, we investigate the physical nature and dynamics of defect-localized excitons under in-plane magnetic fields using steady-state and time-resolved photoluminescence (PL) spectroscopy. Our observations reveal a sharp PL peak indicative of single-photon emission, comprising doublet peaks from excitons with hybridized spin states. Notably, magnetic brightening of the PL peak was detected in a small magnetic field below 1 T, and the dynamics of localized excitons in the hybridized states under magnetic fields show the field-induced mixing of two states, which determines the magnetic brightening phenomena. These insights pave the way for tunable single-photon emitters manipulated by external magnetic fields, heralding advances in quantum optics applications.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: magnetic brightening
, defect-localized excitons
, WSe2


Date published: 2025-06-06

Publisher: American Association for the Advancement of Science (AAAS)

Journal:

• Science Advances (ISSN: 23752548) vol. 11 issue. 23 eadr5562

Funding:

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1126/sciadv.adr5562

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Updated at: 2026-04-03 11:32:17 +0900

Published on MDR: 2026-04-03 16:27:43 +0900