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Related Concept Videos

Group Polarization01:01

Group Polarization

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Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.
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The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
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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 29, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Circular polarization detector based on polarization holography.

Yuanying Zhang, Qi Zhang, Xiaochuan Jiang

    Optics Letters
    |May 23, 2023
    PubMed
    Summary
    This summary is machine-generated.

    We developed a novel circular polarization detector using planar polarization holography. This cost-effective method quickly distinguishes right- and left-handed circularly polarized light for advanced polarization detection applications.

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    Area of Science:

    • Optics and Photonics
    • Holography
    • Polarization Optics

    Background:

    • Circular polarization detection is crucial in various optical applications.
    • Existing methods for generating polarization detectors can be complex and time-consuming.

    Purpose of the Study:

    • To propose and demonstrate a novel, time-saving, and cost-effective circular polarization detector.
    • To utilize planar polarization holography and multiplexed holograms for polarization detection.

    Main Methods:

    • Designed a detector based on planar polarization holography and the null reconstruction effect.
    • Created multiplexed holograms combining two patterns for opposite circular polarization beams.
    • Experimentally demonstrated the generation of the polarization multiplexed hologram element.

    Main Results:

    • Successfully generated a circular polarization detector with functionality equivalent to a chiral hologram.
    • Experimentally distinguished right- and left-handed circularly polarized beams based on output signals.
    • Achieved detector generation in a few seconds.

    Conclusions:

    • The proposed method offers a rapid and economical approach for creating circular polarization detectors.
    • This technique opens new possibilities for polarization detection in diverse scientific and technological fields.