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Group Polarization

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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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Published on: September 5, 2019

Integrated-optic polarization-splitting directional coupler.

K Thyagarajan, S Diggavi, A K Ghatak

    Optics Letters
    |September 18, 2009
    PubMed
    Summary
    This summary is machine-generated.

    We developed a new integrated-optic polarization-splitting directional coupler using metal-coated waveguides. This device achieves excellent performance with high extinction ratios and low signal loss.

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    Area of Science:

    • Photonics and Optical Engineering
    • Integrated Optics
    • Waveguide Devices

    Background:

    • Directional couplers are fundamental components in integrated optics.
    • Achieving efficient polarization splitting is crucial for various photonic applications.
    • Existing designs often face limitations in performance or fabrication complexity.

    Purpose of the Study:

    • To introduce a novel integrated-optic polarization-splitting directional coupler.
    • To demonstrate high performance in terms of extinction ratio and insertion loss.
    • To explore the use of metal coatings for polarization control in waveguide devices.

    Main Methods:

    • Fabrication of a directional coupler with two channel waveguides.
    • Coating waveguides with thin metal layers of varying thicknesses.
    • Utilizing the effective-index method for optical analysis.
    • Employing a matrix method for performance calculation.

    Main Results:

    • The proposed structure achieves extinction ratios exceeding -20 dB.
    • Insertion loss is demonstrated to be below 1.0 dB.
    • The design shows potential for efficient polarization splitting in integrated photonic circuits.

    Conclusions:

    • The novel metal-coated waveguide structure offers a promising solution for polarization splitting.
    • The demonstrated performance metrics are competitive for integrated optical devices.
    • This approach provides a new avenue for designing advanced optical components.