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Fabrication of Silica Ultra High Quality Factor Microresonators
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Dispersion in silica microbubble resonators.

Nicolas Riesen, Wen Qi Zhang, Tanya M Monro

    Optics Letters
    |March 16, 2016
    PubMed
    Summary
    This summary is machine-generated.

    Engineered silica microbubbles enable tunable dispersion for nonlinear optics. This breakthrough allows for the development of visible optical frequency combs, opening new application possibilities.

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    Area of Science:

    • Nonlinear optics
    • Microscale photonics
    • Materials science

    Background:

    • Whispering gallery mode resonators are crucial for nonlinear optical applications.
    • Silica microbubbles offer a unique platform for light-matter interactions.
    • Dispersion engineering is key to controlling light propagation in microresonators.

    Purpose of the Study:

    • To investigate the tunability of optical dispersion in silica microbubbles.
    • To explore the potential for nonlinear applications, specifically optical frequency comb generation.
    • To demonstrate the feasibility of visible frequency comb generation using engineered microbubbles.

    Main Methods:

    • Fabrication of silica microbubbles with controlled shell thickness and diameter.
    • Theoretical modeling of light propagation and dispersion characteristics.
    • Analysis of zero dispersion wavelength tunability via shell thickness variation.

    Main Results:

    • The zero dispersion wavelength of silica microbubbles is highly tunable by adjusting shell thickness.
    • Dispersion equalization within the visible spectrum is predicted for microbubbles with small diameter and wall thickness.
    • This tunability facilitates the generation of optical frequency combs.

    Conclusions:

    • Silica microbubbles are a promising platform for dispersion engineering.
    • Tunable dispersion enables the realization of visible optical frequency combs.
    • This research opens avenues for novel photonic devices and applications.