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Related Concept Videos

Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

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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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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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Absorption-based polarization gratings.

Tao Zhan, Jianghao Xiong, Guanjun Tan

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    |May 15, 2020
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    Summary
    This summary is machine-generated.

    We developed novel absorption-based polarization gratings using dichroic dye-doped liquid crystals. These versatile gratings offer tunable spectral ranges and applications in polarimetry and liquid crystal device fabrication.

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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Liquid Crystal Technology

    Background:

    • Polarization gratings are crucial optical components.
    • Dye-doped liquid crystals offer tunable optical properties.
    • Existing gratings may lack specific functionalities for advanced applications.

    Purpose of the Study:

    • To demonstrate a novel absorption-based polarization grating.
    • To explore its polarization-sensitive diffraction efficiency.
    • To investigate its potential applications in polarimetry and photopatterning.

    Main Methods:

    • Fabrication of dichroic dye-doped polymerizable liquid crystal gratings.
    • Theoretical analysis of polarization-sensitive diffraction.
    • Experimental validation of grating performance.
    • Characterization of spectral tunability.

    Main Results:

    • Demonstrated polarization-sensitive diffraction efficiency over the dye's absorption band.
    • Achieved tunable spectral ranges by varying dye materials.
    • Generated first-order diffracted beams with orthogonal circular polarizations.
    • Confirmed LED compatibility for photopatterning applications.

    Conclusions:

    • Absorption-based polarization gratings offer a versatile platform for optical applications.
    • These gratings are suitable for polarimetry systems.
    • Their absorptive nature enables use as polarization masks in liquid crystal device fabrication.