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Related Experiment Video

Updated: Jun 20, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

Published on: October 11, 2016

Phase behavior near total absorption by a metallic grating.

R A Depine, V L Brudny, J M Simon

    Optics Letters
    |September 10, 2009
    PubMed
    Summary
    This summary is machine-generated.

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    Metallic gratings can completely absorb specific diffracted orders. This study uses an exact differential method to analyze phase behavior in cycloidal gratings, explaining observed resonant anomalies and scattering matrix properties.

    Area of Science:

    • Physics
    • Optics
    • Electromagnetism

    Background:

    • Metallic gratings exhibit complete absorption of specific diffracted orders when illuminated by S-polarized electromagnetic waves.
    • This phenomenon is associated with two distinct experimental behaviors near resonant anomalies.

    Purpose of the Study:

    • To investigate the phase behavior of cycloidal metallic gratings with varying groove-depth-to-period ratios.
    • To explain the experimentally observed behaviors near resonant anomalies using electromagnetic theory.
    • To provide additional insights into the zeros of the scattering matrix in the complex plane.

    Main Methods:

    • Utilizing an exact differential method for precise calculations.
    • Analyzing phase versus angle-of-incidence curves.

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    Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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    Published on: October 11, 2016

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  • Employing an algorithm based on the electromagnetic theory of gratings.

    • Main Results:

    • Calculated phase versus angle-of-incidence curves for cycloidal metallic gratings.
    • Demonstrated that the grating theory algorithm accurately models experimentally observed resonant anomaly behaviors.
    • Identified the significance of scattering matrix zeros in the complex plane.

    Conclusions:

    • The electromagnetic theory of gratings effectively explains resonant anomalies in metallic gratings.
    • The study provides a theoretical framework for understanding complete absorption phenomena.
    • Analysis of scattering matrix zeros offers deeper insights into grating electromagnetics.