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Related Experiment Video

Updated: Jun 22, 2026

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Dynamical localization in microdisk lasers.

Wei Fang, H Cao, V Podolskiy

    Optics Express
    |June 6, 2009
    PubMed
    Summary
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    We show that rough microdisk resonators can create high-quality (high-Q) laser modes through dynamical Anderson localization, overcoming surface defects. This finding applies to various semiconductor and polymer lasers and sensors.

    Area of Science:

    • Optics and Photonics
    • Condensed Matter Physics
    • Materials Science

    Background:

    • Microdisk resonators typically support whispering gallery modes (WGMs).
    • Boundary roughness and surface defects scatter light, degrading WGM quality.
    • Existing methods struggle to maintain high-Q modes in imperfect microcavities.

    Purpose of the Study:

    • To demonstrate lasing action from dynamically localized modes in microdisk resonators with rough boundaries.
    • To investigate the origin of high-Q modes in imperfect microcavities.
    • To explore the applicability of this phenomenon in various laser and sensor technologies.

    Main Methods:

    • Fabrication of microdisk resonators with intentionally introduced boundary roughness.
    • Optical imaging to directly visualize the lasing mode patterns.

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  • Theoretical calculations to analyze light scattering and mode localization phenomena.

    • Main Results:

    • Observed lasing action originating from dynamically localized modes, not traditional WGMs.
    • Demonstrated that destructive interference of scattered light leads to Anderson localization.
    • Achieved high-Q modes despite significant boundary roughness and surface defects.

    Conclusions:

    • Dynamical Anderson localization can create robust high-Q modes in microdisk resonators with imperfections.
    • This mechanism offers a new pathway for designing lasers and sensors with enhanced performance.
    • The findings are potentially applicable to GaAs-InAs microdisk lasers and other semiconductor or polymer-based devices.