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Fabrication and Characterization of Superconducting Resonators
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Fabrication methods for infrared resonant devices.

D J Carney, R Magnusson

    Optics Letters
    |November 2, 2018
    PubMed
    Summary

    Researchers developed fabrication methods for mid-infrared photonic metastructures. These techniques enable robust, wideband reflectors with high reflectance for advanced optical applications.

    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Nanotechnology

    Background:

    • Mid-infrared (8-13 μm) photonic metastructures are crucial for advanced optical applications.
    • Fabrication techniques for these metastructures, bridging nano- and micro-fabrication, are not well-documented.

    Purpose of the Study:

    • To present detailed, repeatable fabrication blueprints for mid-infrared photonic metastructures.
    • To demonstrate a robust wideband reflector with high reflectance in the mid-infrared spectrum.

    Main Methods:

    • Utilized a Germanium (Ge) device layer on a Zinc Sulfide (ZnS) substrate.
    • Employed a conformal regrowth technique to enhance device performance.
    • Fabrication methods are designed for accessibility in standard laboratory settings.

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    Main Results:

    • Achieved a materially robust transverse-magnetic-polarized wideband reflector.
    • Demonstrated a ~3 μm wide 90% reflectance band from 8.1 μm to 11.1 μm.
    • Obtained a 98% reflectance band spanning 8.7 μm to 10.4 μm.

    Conclusions:

    • The presented fabrication blueprints offer a reliable method for creating mid-infrared photonic metastructures.
    • The developed techniques are generalizable and applicable in most standard fabrication laboratories.
    • These advancements facilitate the development of high-performance optical devices in the mid-infrared range.