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Wideband Optical Detector of Ultrasound for Medical Imaging Applications
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Published on: May 11, 2014

An angle-independent Frequency Selective Surface in the optical range.

Daniel Van Labeke, Davy Gérard, Brahim Guizal

    Optics Express
    |June 17, 2009
    PubMed
    Summary
    This summary is machine-generated.

    We designed Frequency Selective Surfaces (FSS) for optical frequencies. These surfaces offer high transmission independent of light angle and polarization, a key advance for optical applications.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Frequency Selective Surfaces (FSS) are crucial for controlling electromagnetic wave transmission.
    • Existing FSS designs often exhibit angle and polarization-dependent behavior, limiting their optical applications.

    Purpose of the Study:

    • To propose and numerically demonstrate a novel FSS design for the optical (visible and near-infrared) spectrum.
    • To achieve angle- and polarization-independent transmission properties in optical FSS.

    Main Methods:

    • Numerical demonstration of an FSS composed of annular apertures in a metal film, arranged in a square array.
    • Analysis of transmission properties with varying incidence angles and polarization states.

    Main Results:

    • The proposed FSS design exhibits a bandpass with position and width independent of incidence angle and polarization.
    • High transmission is achieved across a range of angles for silver-based FSS.
    • Demonstrated angle- and polarization-independent transmission properties.

    Conclusions:

    • The novel FSS design offers robust performance in the optical range.
    • The findings are extendable to other metals and frequency domains.
    • This work paves the way for advanced optical filters and devices.