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Updated: Sep 13, 2025

High-Sensitivity Nuclear Magnetic Resonance at Giga-Pascal Pressures: A New Tool for Probing Electronic and Chemical Properties of Condensed Matter under Extreme Conditions
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Photonic spin Hall effect enabled highly sensitive pressure sensor.

Yong Wang, Shuaijie Yuan, Chi Zhang

    Optics Express
    |July 30, 2025
    PubMed
    Summary
    This summary is machine-generated.

    We developed a highly sensitive optical pressure sensor using the photonic spin Hall effect (PSHE). This technology enhances pressure measurement accuracy by correlating spin displacement with pressure variations.

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    Area of Science:

    • Optics and Photonics
    • Metrology
    • Materials Science

    Background:

    • Traditional pressure sensors face limitations in sensitivity and accuracy.
    • The photonic spin Hall effect (PSHE) offers a novel mechanism for detecting minute changes.
    • Optical sensing platforms are crucial for non-invasive and high-precision measurements.

    Purpose of the Study:

    • To propose and demonstrate a high-sensitivity pressure sensing platform based on PSHE.
    • To establish a direct correlation between pressure variations and spin-dependent beam displacements.
    • To enhance sensor sensitivity through plasmonic resonance and weak measurement techniques.

    Main Methods:

    • Exploiting the photonic spin Hall effect (PSHE) for pressure-induced refractive index modulation.
    • Implementing a plasmonic resonance configuration within the pressure-sensitive medium.
    • Utilizing weak measurement technology to amplify the sensor's response.

    Main Results:

    • Quantifiable spin-dependent beam displacements were observed due to pressure variations.
    • Plasmonic resonance significantly enhanced the spin spatial shifts in response to pressure.
    • Sensor sensitivity was dramatically increased from 2.55 nm/10 MPa to 1259.3 nm/10 MPa near resonance.

    Conclusions:

    • A novel optical pressure sensor leveraging PSHE and plasmonics was successfully developed.
    • The proposed method offers a significant advancement in optical pressure metrology.
    • This work provides a pathway for developing advanced optical sensors and controlling spin-orbit interactions.