Site-controlled telecom-wavelength single-photon emitters in atomically-thin MoTe2

Zhao, Huan; Pettes, Michael T.; Zheng, Yu; Htoon, Han

doi:10.1038/s41467-021-27033-w

Site-controlled telecom-wavelength single-photon emitters in atomically-thin MoTe2

Journal Article · Fri Nov 19 00:00:00 EST 2021 · Nature Communications

DOI:https://doi.org/10.1038/s41467-021-27033-w· OSTI ID:1831554

; ; Zheng, Yu;

Abstract

Quantum emitters (QEs) in two-dimensional transition metal dichalcogenides (2D TMDCs) have advanced to the forefront of quantum communication and transduction research. To date, QEs capable of operating in O-C telecommunication bands have not been demonstrated in TMDCs. Here we report site-controlled creation of telecom QEs emitting over the 1080 to 1550 nm telecommunication wavelength range via coupling of 2D molybdenum ditelluride (MoTe ₂ ) to strain inducing nano-pillar arrays. Hanbury Brown and Twiss experiments conducted at 10 K reveal clear photon antibunching with 90% single-photon purity. The photon antibunching can be observed up to liquid nitrogen temperature (77 K). Polarization analysis further reveals that while some QEs display cross-linearly polarized doublets with ~1 meV splitting resulting from the strain induced anisotropic exchange interaction, valley degeneracy is preserved in other QEs. Valley Zeeman splitting as well as restoring of valley symmetry in cross-polarized doublets are observed under 8 T magnetic field.

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

Sponsoring Organization:: USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1831554

Alternate ID(s):: OSTI ID: 1832387

Report Number(s):: LA-UR--21-23958; 6753; PII: 27033

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 12; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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