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Controlling surface plasmon polaritons by a static and/or time-dependent external magnetic field

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    0387217 - ÚFE 2013 RIV US eng J - Journal Article
    Kuzmiak, Vladimír - Eyderman, Sergey - Vanwolleghem, M.
    Controlling surface plasmon polaritons by a static and/or time-dependent external magnetic field.
    Physical Review. B. Roč. 86, č. 4 (2012), s. 045403. ISSN 1098-0121. E-ISSN 2469-9969
    R&D Projects: GA ČR(CZ) GAP205/10/0046
    Grant - others:GA MŠk(CZ) MP0702
    Institutional support: RVO:67985882
    Keywords : one-way electromegnetic waveguide * magneto-optic photonic crystal * surface plasmon polarirton
    Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering
    Impact factor: 3.767, year: 2012

    We have demonstrated numerically by using of Fourier Modal Method(FMM) that a waveguide formed by the interface of a metal and uniformly magnetized two-dimensional photonic crystal fabricated from a transparent dielectric magneto-optic (MO) material possesses a one-way frequency range where only a forward propagating surface plasmon polariton (SPP) mode is allowed to propagate. The non-reciprocity at the interface is introduced by the MO properties of the photonic crystal material, namely bismuth iron garnet which may be easily magnetically saturated by fields of the order of tens of mT. The results obtained by FMM have been validated by a theoretical model and a standard plane-wave method. By using a generalized finite-difference time-domain(FDTD) method, which allows studying the propagation of electromagnetic(EM) waves through media with a tensor MO permittivity, we studied transport properties of the one-way waveguide and we examined the influence of specific types of boundary conditions on one-way functionality in the presence of a dc and/or ac external magnetic field. By evaluating the Fourier transform of the energy density we have analyzed the behavior of the field patterns observed in the waveguide in the case of ac magnetic field, and have interpreted new and interesting features associated with the redistribution of the EM field that may offer new mechanisms for dynamical control of SPP flow.
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