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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Chao Hang, Dmitry A Zezyulin, Guoxiang Huang

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    |October 15, 2015
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    Summary
    This summary is machine-generated.

    We demonstrate a tunable, nonlinear defect in photonic crystals using atomic cells. This creates a double-core waveguide with parity-time (PT) symmetry, enabling stable nonlinear defect modes.

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    Area of Science:

    • * Photonics
    • * Quantum Optics
    • * Condensed Matter Physics

    Background:

    • * One-dimensional photonic crystals offer unique light-manipulation properties.
    • * Atomic systems embedded in photonic structures enable novel optical functionalities.
    • * Nonlinear optical effects are crucial for advanced photonic devices.

    Purpose of the Study:

    • * To propose a scheme for creating a tunable, highly nonlinear defect in a one-dimensional photonic crystal.
    • * To investigate the formation of parity-time (PT) symmetric potentials within the defect.
    • * To explore the existence of stable nonlinear defect modes.

    Main Methods:

    • * Utilizing a one-dimensional photonic crystal with an embedded atomic cell containing a mixture of two isotopes of three-level atoms.
    • * Engineering a complex defect potential with double-well real and linear imaginary parts.
    • * Applying a combination of control and Stark fields to achieve parity-time (PT) symmetry for the induced refractive index.

    Main Results:

    • * Creation of an effective double-core waveguide due to the defect.
    • * Achieved parity-time (PT) symmetric complex defect potential.
    • * Demonstrated the formation of various stable nonlinear defect modes supported by focusing nonlinearity.

    Conclusions:

    • * The proposed scheme successfully creates a tunable, highly nonlinear defect.
    • * PT symmetry is achievable in the engineered defect, leading to unique optical properties.
    • * Stable nonlinear defect modes can be supported, paving the way for novel photonic applications.