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Related Experiment Video

Updated: Jun 22, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Direct rotation-induced intensity modulation in circular Bragg micro-lasers.

Jacob Scheuer

    Optics Express
    |June 25, 2009
    PubMed
    Summary

    Rotation directly impacts the lasing threshold of circular Bragg micro-lasers, beyond the Sagnac effect. This discovery enables the development of novel micro-rotation sensors.

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    Area of Science:

    • Optics and Photonics
    • Micro-device Engineering
    • Sensing Technologies

    Background:

    • Circular Bragg micro-lasers are advanced optical devices with unique lasing characteristics.
    • The Sagnac effect is a known phenomenon causing wavelength detuning in rotating systems.
    • Understanding rotational influences on micro-laser performance is crucial for sensor applications.

    Purpose of the Study:

    • To investigate the direct effect of rotation on the lasing properties of circular Bragg micro-lasers.
    • To analyze the impact of rotation on both clockwise and counterclockwise lasing modes.
    • To explore the potential of this phenomenon for creating micro-rotation sensors.

    Main Methods:

    • Experimental study of circular Bragg micro-lasers under rotational conditions.
    • Analysis of lasing wavelength detuning and threshold variations.
    • Comparison of clockwise and counterclockwise rotating mode behavior.

    Main Results:

    • Rotation causes wavelength detuning due to the Sagnac shift.
    • A direct influence of rotation on the lasing threshold of rotating modes is observed.
    • Differential effects on clockwise and counterclockwise modes are identified.

    Conclusions:

    • Rotation has a direct, measurable impact on micro-laser lasing thresholds.
    • This effect is distinct from and in addition to the Sagnac shift.
    • The observed phenomenon presents a novel pathway for developing highly sensitive micro-rotation sensors.

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