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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Waveguide integrated hot electron bolometer for classical and quantum photonics.

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    Researchers developed integrated hot electron bolometers (HEBs) for photonic quantum processors. These detectors show high responsivity and near-quantum-limited noise, advancing continuous-variable quantum computing.

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    Area of Science:

    • Quantum optics
    • Integrated photonics
    • Solid-state devices

    Background:

    • Scalable photonic quantum processors require integrated detectors sensitive to quantum fluctuations.
    • Continuous-variable quantum information processing relies on precise light state detection.

    Purpose of the Study:

    • To investigate the performance of hot electron bolometers (HEBs) integrated onto silicon-on-insulator (SOI) photonic circuits.
    • To assess the potential of these integrated HEBs for continuous-variable quantum information processing.

    Main Methods:

    • Fabrication of HEBs on SOI photonic circuits.
    • Characterization of HEB responsivity and noise equivalent temperature.
    • Analysis of noise sources in waveguide-integrated HEBs.

    Main Results:

    • Achieved responsivities up to 8600 V/W.
    • Demonstrated a record noise equivalent temperature of 1.1 dB above the quantum limit.
    • Estimated 14.8 dBV clearance between shot and electrical noise with 1.1µW local oscillator power.

    Conclusions:

    • Integrated HEBs offer high performance for quantum fluctuation detection.
    • Compatibility with superconducting nanowire single-photon detectors (SNSPDs) enables versatile quantum platform development.
    • This technology paves the way for advanced optical quantum processors and nonclassical state engineering.