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An arched gate can be effectively modeled using a hyperbolic cosine profile because this type of function is smooth and symmetric about the vertical axis. When the arch is centered at the origin, its maximum height occurs at the center point. This symmetry ensures that any height below the crown of the arch is reached at two horizontal positions that are equal in distance from the centerline but lie on opposite sides.To determine where the gate reaches a height of five meters, the height of the...
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Fabricating Metamaterials Using the Fiber Drawing Method
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Optical bistability based on hyperbolic metamaterials.

Myunghwan Kim, Sangin Kim, Soeun Kim

    Optics Express
    |May 3, 2018
    PubMed
    Summary
    This summary is machine-generated.

    We demonstrate optical bistability in nonlinear multilayer structures using hyperbolic metamaterials (HMMs). This non-resonant approach achieves fast switching and low intensity, overcoming limitations of traditional methods.

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    Area of Science:

    • Photonics and Optics
    • Materials Science
    • Condensed Matter Physics

    Background:

    • Optical bistability is crucial for all-optical switching and signal processing.
    • Resonance-based methods often face trade-offs between switching intensity and response time.
    • Hyperbolic metamaterials (HMMs) offer unique dispersion properties for novel optical functionalities.

    Purpose of the Study:

    • To numerically demonstrate optical bistability in a nonlinear multilayer structure.
    • To utilize the unique dispersion of HMMs for a non-resonant optical bistability scheme.
    • To investigate topological transitions in HMMs for high-performance optical bistability.

    Main Methods:

    • Numerical simulations of nonlinear multilayer structures incorporating HMMs.
    • Analysis of isofrequency contour topological transitions.
    • Investigation of HMM Type II to Type I and Type II HMM to effective dielectric transitions.

    Main Results:

    • Demonstration of optical bistability via topological transitions in HMMs.
    • Achieved optical bistability with a short response time and low switching intensity.
    • Identified specific HMM transitions suitable for high-performance optical bistability.

    Conclusions:

    • Non-resonant optical bistability is achievable in nonlinear HMM multilayer structures.
    • Topological transitions in HMMs offer a route to overcome performance trade-offs.
    • The proposed schemes provide a promising avenue for advanced optical devices.