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Related Experiment Video

Updated: Oct 12, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Site-controlled telecom-wavelength single-photon emitters in atomically-thin MoTe2.

Huan Zhao1, Michael T Pettes2, Yu Zheng2

  • 1Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA. huanzha@lanl.gov.

Nature Communications
|November 20, 2021
PubMed
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Researchers created telecom-wavelength quantum emitters in 2D molybdenum ditelluride (MoTe2) by coupling it to nanostructures. These emitters show high single-photon purity, paving the way for quantum communication technologies.

Area of Science:

  • Quantum Optics
  • Materials Science
  • Nanotechnology

Background:

  • Quantum emitters (QEs) in 2D transition metal dichalcogenides (2D TMDCs) are crucial for quantum communication.
  • Previous TMDC QEs have not operated in the O-C telecommunication bands.

Purpose of the Study:

  • To demonstrate site-controlled telecom quantum emitters in 2D TMDCs.
  • To achieve QEs operating within the 1080 to 1550 nm telecommunication wavelength range.

Main Methods:

  • Coupling 2D molybdenum ditelluride (MoTe2) to strain-inducing nanopillar arrays.
  • Utilizing Hanbury Brown and Twiss experiments to verify single-photon purity.
  • Conducting polarization analysis and applying magnetic fields.

Main Results:

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  • Successfully created telecom quantum emitters in MoTe2 operating from 1080 to 1550 nm.
  • Demonstrated clear photon antibunching with 90% single-photon purity at 10 K, observable up to 77 K.
  • Observed strain-induced anisotropic exchange interaction and preserved valley degeneracy, with effects modulated by an 8 T magnetic field.

Conclusions:

  • Site-controlled telecom quantum emitters were realized in MoTe2 via strain engineering.
  • The developed QEs exhibit high performance and temperature stability, suitable for quantum communication.
  • Strain and magnetic fields offer tunable control over QE properties, including valley dynamics.