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Related Experiment Video

Updated: Aug 30, 2025

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

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Nanovibration detection based on a microsphere.

Chunlei Jiang, Weicheng Wang, Bing Yan

    Optics Letters
    |September 1, 2022
    PubMed
    Summary

    We developed a novel microsphere-based sensor for detecting nanovibrations. This single-mode fiber-microsphere probe (SMFMP) achieves 1 nm resolution, enabling real-time nanovibration waveform detection.

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    Related Experiment Videos

    Last Updated: Aug 30, 2025

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    Area of Science:

    • Optical Physics
    • Nanotechnology
    • Sensor Technology

    Background:

    • Nanoscale vibration detection is crucial for various scientific and technological fields.
    • Existing methods often face limitations in sensitivity, real-time monitoring, or non-invasiveness.
    • Photonic nanojets (PNJs) offer unique light-matter interaction properties at the nanoscale.

    Purpose of the Study:

    • To introduce a novel sensor for high-resolution nanovibration detection.
    • To investigate the performance and characteristics of the proposed sensor system.
    • To explore potential applications in sensitive biological measurements, such as cell nanovibration.

    Main Methods:

    • Fabrication of a sensor probe using a single-mode fiber and a 2 µm microsphere.
    • Utilizing the photonic nanojet (PNJ) phenomenon generated by light passing through the microsphere.
    • Leveraging the enhanced evanescent field of the PNJ for improved light reflection detection.

    Main Results:

    • The single-mode fiber-microsphere probe (SMFMP) achieved a detection resolution of 1 nm.
    • Real-time detection of arbitrary nanovibration waveforms was demonstrated.
    • A linear relationship (R² > 99%) was observed between voltage signal and vibration amplitude (0-100 nm), with a sensitivity of 0.7 mV/nm.

    Conclusions:

    • The proposed microsphere-based sensor offers a promising solution for nanovibration detection.
    • The sensor exhibits high sensitivity, linearity, and real-time monitoring capabilities.
    • Potential applications include sensitive nanovibration analysis in biological systems, particularly for cell studies.