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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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Binary-lens-embedded photonic crystals.

Chun Xia, Edgar Bustamante, Stephen M Kuebler

    Optics Letters
    |June 16, 2022
    PubMed
    Summary
    This summary is machine-generated.

    A novel binary-lens-embedded photonic crystal (B-LEPC) achieves efficient light focusing. This photonic crystal lens, fabricated using multiphoton lithography, demonstrates a high numerical aperture for precise optical control.

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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Nanotechnology

    Background:

    • Photonic crystals offer unique light manipulation capabilities.
    • Achieving efficient focusing with compact optical elements remains a challenge.
    • Self-collimation in photonic crystals guides light without diffraction.

    Purpose of the Study:

    • To design and fabricate a binary-lens-embedded photonic crystal (B-LEPC) for operation at 1550 nm.
    • To investigate the self-collimation properties and focusing capabilities of the B-LEPC.
    • To demonstrate a compact and efficient focusing element using photonic crystal structures.

    Main Methods:

    • Design of a B-LEPC utilizing unit cells with two distinct fill factors and a 'rod-in-wall' structure.
    • Fabrication of the B-LEPC using multiphoton lithography.
    • Numerical simulations to analyze light propagation, self-collimation, and wavefront reshaping.
    • Experimental characterization of the focusing performance and numerical aperture (NA).

    Main Results:

    • The B-LEPC design enables self-collimation, guiding light without diffraction or unintended focusing within the device.
    • A Fresnel-like phase wrapping reduced the B-LEPC thickness threefold.
    • Experimental demonstration of focusing with a high numerical aperture of NA = 0.59.
    • The reshaped wavefront upon exiting the device leads to efficient light focusing.

    Conclusions:

    • The B-LEPC is a promising compact optical element for efficient light focusing at 1550 nm.
    • The combination of self-collimation and Fresnel-like phase wrapping allows for reduced device footprint and enhanced performance.
    • This technology has potential applications in integrated optics and optical communication systems.