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Related Concept Videos

Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...

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Related Experiment Video

Updated: Jun 12, 2026

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

Anisotropic guided-wave diffraction by interdigitated electrode-induced phase gratings.

E N Glytsis, T K Gaylord

    Applied Optics
    |June 12, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study analyzes light diffraction in anisotropic waveguides using rigorous coupled-wave analysis. It identifies conditions for efficient light redirection in devices like lithium niobate waveguide structures.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Anisotropic waveguides are crucial for advanced optical devices.
    • Voltage-controlled phase gratings enable tunable optical functions.

    Purpose of the Study:

    • To analyze the diffraction of guided modes in uniaxial anisotropic slab waveguides.
    • To identify conditions for efficient diffraction and guided mode reconstruction.

    Main Methods:

    • Decomposition of pure guided modes into plane wave components.
    • Three-dimensional vector rigorous coupled-wave diffraction analysis.
    • Analysis of anisotropic gratings with anisotropic external regions.

    Main Results:

    • Identified geometrical and phase/amplitude requirements for diffracted waves to form a guided mode.
    • Calculated diffracted mode efficiencies and Bragg conditions.
    • Determined optimal optic axis orientations for efficient diffraction.

    Conclusions:

    • The rigorous coupled-wave analysis provides a framework for designing efficient anisotropic waveguide devices.
    • The findings are validated by favorable comparisons with experimental results for lithium niobate devices.