TY - JOUR
T1 - Magnetic Proximity Coupling of Quantum Emitters in WSe2 to van der Waals Ferromagnets
AU - Shayan, Kamran
AU - Liu, Na
AU - Cupo, Andrew
AU - Ma, Yichen
AU - Luo, Yue
AU - Meunier, Vincent
AU - Strauf, Stefan
N1 - Publisher Copyright:
Copyright © 2019 American Chemical Society.
PY - 2019/10/9
Y1 - 2019/10/9
N2 - The realization of on-chip quantum networks requires tunable quantum states to encode information carriers on them. We show that Cr2Ge2Te6 (CGT) as a van der Waals ferromagnet can enable magnetic proximity coupling to site-controlled quantum emitters in WSe2, giving rise to ultrahigh exciton g factors up to 20 ± 1. By comparing the same site-controlled quantum emitter before and after ferromagnetic proximity coupling, we also demonstrate a technique to directly measure the resulting magnetic exchange field (MEF) strength. Experimentally determined values of MEF up to 1.2 ± 0.2 meV in the saturation regime approach the theoretical limit of 2.1 meV that was determined from density functional theory calculations of the CGT/WSe2 heterostructure. Our work extends the on-chip control of magneto-optical properties of excitons via van der Waals heterostructures to solid-state quantum emitters.
AB - The realization of on-chip quantum networks requires tunable quantum states to encode information carriers on them. We show that Cr2Ge2Te6 (CGT) as a van der Waals ferromagnet can enable magnetic proximity coupling to site-controlled quantum emitters in WSe2, giving rise to ultrahigh exciton g factors up to 20 ± 1. By comparing the same site-controlled quantum emitter before and after ferromagnetic proximity coupling, we also demonstrate a technique to directly measure the resulting magnetic exchange field (MEF) strength. Experimentally determined values of MEF up to 1.2 ± 0.2 meV in the saturation regime approach the theoretical limit of 2.1 meV that was determined from density functional theory calculations of the CGT/WSe2 heterostructure. Our work extends the on-chip control of magneto-optical properties of excitons via van der Waals heterostructures to solid-state quantum emitters.
KW - 2D materials
KW - g factor
KW - magnetic exchange field
KW - magnetic proximity effect
KW - quantum emitter
KW - van der Waals ferromagnet
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U2 - 10.1021/acs.nanolett.9b02920
DO - 10.1021/acs.nanolett.9b02920
M3 - Article
C2 - 31550164
AN - SCOPUS:85072978840
SN - 1530-6984
VL - 19
SP - 7301
EP - 7308
JO - Nano Letters
JF - Nano Letters
IS - 10
ER -