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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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    Superposing two 1D gratings for 2D beam arrangements in Terahertz applications is common but inefficient. A new method significantly boosts grating efficiency for these beam multiplexers.

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    Area of Science:

    • Optics and Photonics
    • Electromagnetics
    • Terahertz Science and Technology

    Background:

    • Phase gratings are essential components for beam multiplexing in the submillimeter and Terahertz (THz) spectral ranges.
    • Creating two-dimensional (2D) beam arrangements is frequently achieved by superposing two independent one-dimensional (1D) grating structures.

    Purpose of the Study:

    • To investigate the efficiency limitations of superposed 1D gratings for 2D beam arrangements.
    • To propose and validate a novel method for achieving significantly higher grating efficiencies in this configuration.

    Main Methods:

    • Theoretical analysis of grating efficiency for superposed 1D structures.
    • Development of an optimized grating design methodology.
    • Numerical simulations or experimental validation (details not specified in abstract).

    Main Results:

    • The superposition of two 1D gratings generally does not achieve maximum possible grating efficiency for 2D beam arrangements.
    • The proposed method demonstrates the potential for substantially improved efficiency compared to the standard superposition approach.

    Conclusions:

    • Optimized grating design is crucial for efficient 2D beam multiplexing in the THz range.
    • The presented method offers a pathway to overcome the inherent efficiency limitations of simple superposition techniques.