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Related Experiment Video

Updated: Feb 19, 2026

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Frequency conversion in silicon in the single photon regime.

Bryn A Bell, Jiakun He, Chunle Xiong

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    Researchers developed a silicon-on-insulator device for single photon frequency conversion, crucial for quantum networks. This technology enables interference between photons of different frequencies, advancing quantum communication capabilities.

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    Area of Science:

    • Quantum communication
    • Integrated photonics
    • Nonlinear optics

    Background:

    • Quantum communication networks require efficient single photon frequency converters.
    • These converters are essential for wavelength shifting, quantum memory operation, and enabling quantum interference.

    Purpose of the Study:

    • To demonstrate single photon frequency conversion using an integrated silicon-on-insulator device.
    • To achieve high conversion efficiencies and controllable frequency shifts for quantum applications.

    Main Methods:

    • Utilized four-wave mixing Bragg scattering in a silicon-on-insulator waveguide.
    • Attenuated laser pulses to the single photon regime for conversion.
    • Tuned pump laser frequencies to control the output frequency shift.

    Main Results:

    • Achieved frequency conversion efficiencies up to 12% (32% corrected for nonlinear loss).
    • Demonstrated convenient tunability of frequency shifts by adjusting pump frequencies.
    • Showcased successful interference between photons at different frequencies post-conversion.

    Conclusions:

    • The integrated silicon-on-insulator device effectively performs single photon frequency conversion.
    • This technology is a viable solution for enabling quantum interference in quantum networks.
    • The demonstrated method offers a practical approach for advancing quantum communication systems.