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Related Experiment Video

Updated: Jun 15, 2026

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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A tunable transition metal dichalcogenide entangled photon-pair source.

Maximilian A Weissflog1,2, Anna Fedotova3,4, Yilin Tang5

  • 1Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Straße 15, Jena, 07745, Germany. maximilian.weissflog@uni-jena.de.

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|August 31, 2024
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Summary

Researchers developed a tiny, robust entangled photon-pair source using transition metal dichalcogenide crystals for quantum technologies. This breakthrough enables compact quantum devices for space-limited applications.

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Area of Science:

  • Quantum optics
  • Materials science
  • Nanotechnology

Background:

  • Entangled photon-pair sources are crucial for quantum technologies like quantum key distribution, sensing, and imaging.
  • Existing sources often lack the robustness and miniaturization needed for mobile or space-based applications.

Purpose of the Study:

  • To develop a compact and robust entangled photon-pair source suitable for space-limited and adverse environments.
  • To leverage the unique properties of transition metal dichalcogenide crystals for efficient quantum light generation.

Main Methods:

  • Fabrication of a cubic micrometer scale entangled photon-pair source using 3R-stacked transition metal dichalcogenide crystals.
  • Utilizing the crystal symmetry for direct generation of polarization-entangled Bell states.
  • Controlling pump polarization for tunable entanglement properties.

Main Results:

  • Achieved a highly miniaturized entangled photon-pair source with micrometer scale dimensions.
  • Demonstrated generation of polarization-entangled Bell states directly from crystal symmetry, eliminating the need for additional components.
  • Showcased decoupled control of generation rate and state tuning, maintaining high efficiency and entanglement fidelity.
  • Achieved equal generation efficiency without loss of entanglement.

Conclusions:

  • The developed transition metal dichalcogenide-based source offers a pathway to robust, ultrasmall, and scalable quantum devices.
  • Integration with photonic circuitry or quasi-phasematching techniques can further enhance device scalability and performance.
  • This work addresses critical requirements for deploying quantum technologies in mobile and satellite-based communication systems.