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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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In mechanics, when one observes a rigid body in rotational motion with constant angular acceleration, it is possible to establish equations for its rotational kinematics. This process resembles how linear kinematics are dealt with in simpler motion studies.
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The intrinsic polarity of cells can be primarily attributed to two factors- i) the asymmetric accumulation of mobile components such are regulatory molecules and subcellular components across the cell and ii) the orientation of polar cytoskeletal filaments that make up the cytoskeletal networks, specifically microfilaments, and microtubules arranged along the axis of polarity. Interactions between the cytoskeletal filaments are crucial for the establishment and maintenance of the polar nature...
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By definition, a spherically symmetric body has the same moment of inertia about any axis passing through its center of mass. This situation changes if there is no spherical symmetry. Since most rigid bodies are not spherically symmetric, these require special treatment.
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Related Experiment Video

Updated: Feb 14, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Integrated InP polarization rotator using the plasmonic effect.

Shinmo An, O-Kyun Kwon

    Optics Express
    |February 7, 2018
    PubMed
    Summary

    We developed a compact indium phosphide (InP) polarization rotator using plasmonics. This device acts as a half-wave retarder, achieving a 20 dB polarization extinction ratio (PER) with a simple fabrication process.

    Area of Science:

    • Photonics and Nanophotonics
    • Integrated Optics
    • Plasmonics

    Background:

    • Polarization control is crucial for integrated photonic circuits.
    • Existing polarization rotators often face challenges in fabrication complexity and device size.
    • Indium Phosphide (InP) is a key material for optoelectronic devices.

    Purpose of the Study:

    • To present an integrated InP-based polarization rotator scheme.
    • To leverage the plasmonic effect for efficient polarization rotation.
    • To achieve a compact and easily fabricated half-wave retarder.

    Main Methods:

    • Utilizing a ridge waveguide structure in InP.
    • Integrating a metal layer in the upper cladding to induce plasmonic effects.
    • Controlling the rotation angle by precisely positioning the metal layer's corner.

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  • Fabricating the device with a length under 50 μm.
  • Main Results:

    • Demonstrated a functional half-wave retarder based on the plasmonic effect.
    • Achieved a high polarization extinction ratio (PER) of 20 dB.
    • Confirmed the device's simple and tolerant fabrication process.
    • Obtained a compact device footprint (<50 μm length).

    Conclusions:

    • The proposed InP-based plasmonic polarization rotator offers a simple and effective solution.
    • The device achieves high performance (20 dB PER) in a compact form factor.
    • This scheme is suitable for integration into advanced photonic circuits, simplifying fabrication.