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Integrated quantum photonic sensor based on Hong-Ou-Mandel interference.

Sahar Basiri-Esfahani, Casey R Myers, Ardalan Armin

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    Summary
    This summary is machine-generated.

    This study introduces a novel integrated optical sensor using quantum principles for sensitive detection of force and refractive index. This photonic crystal sensor achieves high performance with low power, rivaling traditional devices.

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    Area of Science:

    • Quantum optics
    • Integrated photonics
    • Nanophotonics

    Background:

    • Photonic-crystal-based integrated optical systems offer high sensitivity, miniaturization, and stability for sensing applications.
    • Integrated optical systems are increasingly explored for photonic quantum information processing using linear optics and Fock states.

    Purpose of the Study:

    • To propose and demonstrate a novel integrated Fock state optical sensor architecture.
    • To enable detection of force, refractive index, and potentially local temperature using quantum interference.

    Main Methods:

    • Utilizing two coupled cavities as an effective beam splitter.
    • Employing fourth-order interference (Hong-Ou-Mandel effect) with single photon pulses.
    • Demonstrating the scheme in coupled L3 photonic crystal cavities.

    Main Results:

    • The sensor can estimate forces as small as 10^-7 Newtons.
    • It can measure a one part per million change in refractive index.
    • Achieved high sensitivity with very low input power (10^-10 W) and without spectral resolution.

    Conclusions:

    • Linear optical quantum photonic architectures can achieve sensor performance comparable to semiclassical devices.
    • The proposed architecture offers a low-power, high-sensitivity sensing solution.
    • This approach opens new avenues for quantum-enhanced sensing applications.