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Related Concept Videos

Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...

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Related Experiment Video

Updated: Jul 7, 2026

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
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Published on: July 18, 2015

Polarization-selective diffractive optical elements with an index-matching gap material.

N Nieuborg, A Kirk, B Morlion

    Applied Optics
    |July 10, 1997
    PubMed
    Summary
    This summary is machine-generated.

    Researchers created polarization-selective diffractive optical elements using calcite. Index-matching polymers improved efficiency and eliminated alignment issues for optical routing applications.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Diffractive optical elements (DOEs) are crucial for optical interconnection and routing.
    • Fabricating polarization-selective DOEs with high efficiency and contrast has been challenging.

    Purpose of the Study:

    • To fabricate and characterize highly polarization-selective diffractive optical elements.
    • To improve the efficiency and alignment of DOEs for optical systems.

    Main Methods:

    • Fabrication of diffractive optical elements using wet etching of calcite substrates.
    • Characterization of element performance with and without index-matching polymer.
    • Utilizing off-axis binary-phase elements.

    Main Results:

    • Achieved first-order diffraction efficiencies of 40.5%.
    • Obtained polarization contrast ratios of 450:1.
    • Demonstrated elimination of substrate alignment problems and increased efficiency by using an index-matching polymer.

    Conclusions:

    • The developed method enables practical application of polarization-selective DOEs in optical systems.
    • Index-matching polymers are key to overcoming fabrication and performance limitations.
    • High polarization selectivity and efficiency are achievable for optical interconnection and routing.