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Related Concept Videos

Magnetic Field Due To A Thin Straight Wire01:27

Magnetic Field Due To A Thin Straight Wire

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Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
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Magnetic Field Due to Two Straight Wires01:18

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Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
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Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
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Surface plasmons in nanowires with toroidal magnetic structure.

N A Gusev, V I Belotelov, A K Zvezdin

    Optics Letters
    |August 15, 2014
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    Summary
    This summary is machine-generated.

    Toroidal magnetization significantly impacts surface plasmon polaritons (SPPs) on nanowires, causing magneto-optical nonreciprocity. This effect, crucial for optical devices, is amplified in cylindrical geometries compared to planar ones.

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    Area of Science:

    • Condensed matter physics
    • Nanophotonics
    • Magneto-optics

    Background:

    • Surface plasmon polaritons (SPPs) are crucial for nanoscale optical phenomena.
    • Cylindrical geometries offer unique electromagnetic field confinement.
    • Toroidal magnetization is an emerging area in condensed matter physics.

    Purpose of the Study:

    • To investigate the influence of toroidal magnetization on SPPs in nanowires.
    • To analyze the resulting magneto-optical effects and nonreciprocity.
    • To compare these effects in cylindrical versus planar systems.

    Main Methods:

    • Derivation of dispersion equations for SPPs on a cylindrical surface.
    • Numerical solutions to analyze the dependence of SPP wavenumber on toroidal moment.
    • Calculations for specific material systems like gold nanowires with bismuth iron garnet.

    Main Results:

    • SPP wavenumber shows a linear dependence on the toroidal moment.
    • Significant magneto-optical nonreciprocity is observed.
    • Splitting of SPP dispersion curves is an order of magnitude larger in cylindrical than planar cases.
    • Low optical loss systems exhibit the largest splitting.

    Conclusions:

    • Toroidal magnetization provides a powerful mechanism for controlling SPPs in nanowires.
    • Cylindrical geometry enhances magneto-optical nonreciprocity for SPPs.
    • This phenomenon holds promise for developing novel nonreciprocal optical devices.