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Standing Waves in a Cavity

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Updated: Jul 9, 2026

Synthesis and Operation of Fluorescent-core Microcavities for Refractometric Sensing
08:12

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Published on: March 13, 2013

Excitation localization principle for spherical microcavities.

H B Lin, J D Eversole, A J Campillo

    Optics Letters
    |December 20, 2007
    PubMed
    Summary

    Van de Hulst

    Area of Science:

    • Physics
    • Optical Physics
    • Cavity Quantum Electrodynamics

    Background:

    • Van de Hulst's localization principle describes energy coupling to spherical cavities.
    • This principle is crucial for understanding light-matter interactions in microcavities.

    Purpose of the Study:

    • To experimentally investigate the validity of Van de Hulst's localization principle in lasing microdroplets.
    • To explore energy coupling mechanisms in both low-Q and high-Q spherical cavities.

    Main Methods:

    • Experimental verification using lasing microdroplets.
    • Comparison of experimental results with theoretical predictions.
    • Numerical modeling to understand excitation mechanisms.

    Main Results:

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    • Localization principle was verified for low-Q modes in homogeneous spheres.
    • The principle failed for high-Q modes dominated by perturbations.
    • Near-surface resonances were excited in high-Q cavities with modified impact parameters.

    Conclusions:

    • Van de Hulst's localization principle applies to low-Q cavities but not high-Q ones.
    • A new energy input channel involving surface scattering is identified for high-Q cavities.