Anomalous polarization conversion in arrays of ultrathin ferromagnetic nanowires

Andrey A. Stashkevich; Yves Roussigné; Alexander N. Poddubny; S. M. Chérif; Y. Zheng; Franck Vidal; Ilya V. Yagupov; Alexei P. Slobozhanyuk; Pavel A. Belov; Yuri S. Kivshar

doi:10.1103/PhysRevB.92.214436

Anomalous polarization conversion in arrays of ultrathin ferromagnetic nanowires

Andrey A. Stashkevich, Yves Roussigné, Alexander N. Poddubny, S. M. Chérif, Y. Zheng, Franck Vidal, Ilya V. Yagupov, Alexei P. Slobozhanyuk, Pavel A. Belov, Yuri S. Kivshar

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8 Citations (Scopus)

Abstract

We study the optical properties of arrays of ultrathin cobalt nanowires by means of the Brillouin scattering of light on magnons. We employ the Stokes/anti-Stokes scattering asymmetry to probe the circular polarization of a local electric field induced inside nanowires by linearly polarized light waves. We observe the anomalous polarization conversion of the opposite sign than that in a bulk medium or thick nanowires with a great enhancement of the degree of circular polarization attributed to the unconventional refraction in a nanowire medium. A rigorous simulation of the electric field polarization as a function of the wire diameter and spacing reveals the reversed polarization for a thin sparse wire array, in full quantitative agreement with experimental results.

Original language	English
Article number	214436
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	92
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.92.214436
Publication status	Published - 28 Dec 2015

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Stashkevich, A. A., Roussigné, Y., Poddubny, A. N., Chérif, S. M., Zheng, Y., Vidal, F., Yagupov, I. V., Slobozhanyuk, A. P., Belov, P. A., & Kivshar, Y. S. (2015). Anomalous polarization conversion in arrays of ultrathin ferromagnetic nanowires. Physical Review B - Condensed Matter and Materials Physics, 92(21), Article 214436. https://doi.org/10.1103/PhysRevB.92.214436

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title = "Anomalous polarization conversion in arrays of ultrathin ferromagnetic nanowires",

abstract = "We study the optical properties of arrays of ultrathin cobalt nanowires by means of the Brillouin scattering of light on magnons. We employ the Stokes/anti-Stokes scattering asymmetry to probe the circular polarization of a local electric field induced inside nanowires by linearly polarized light waves. We observe the anomalous polarization conversion of the opposite sign than that in a bulk medium or thick nanowires with a great enhancement of the degree of circular polarization attributed to the unconventional refraction in a nanowire medium. A rigorous simulation of the electric field polarization as a function of the wire diameter and spacing reveals the reversed polarization for a thin sparse wire array, in full quantitative agreement with experimental results.",

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AU - Stashkevich, Andrey A.

AU - Roussigné, Yves

AU - Poddubny, Alexander N.

AU - Chérif, S. M.

AU - Zheng, Y.

AU - Vidal, Franck

AU - Yagupov, Ilya V.

AU - Slobozhanyuk, Alexei P.

AU - Belov, Pavel A.

AU - Kivshar, Yuri S.

PY - 2015/12/28

Y1 - 2015/12/28

N2 - We study the optical properties of arrays of ultrathin cobalt nanowires by means of the Brillouin scattering of light on magnons. We employ the Stokes/anti-Stokes scattering asymmetry to probe the circular polarization of a local electric field induced inside nanowires by linearly polarized light waves. We observe the anomalous polarization conversion of the opposite sign than that in a bulk medium or thick nanowires with a great enhancement of the degree of circular polarization attributed to the unconventional refraction in a nanowire medium. A rigorous simulation of the electric field polarization as a function of the wire diameter and spacing reveals the reversed polarization for a thin sparse wire array, in full quantitative agreement with experimental results.

AB - We study the optical properties of arrays of ultrathin cobalt nanowires by means of the Brillouin scattering of light on magnons. We employ the Stokes/anti-Stokes scattering asymmetry to probe the circular polarization of a local electric field induced inside nanowires by linearly polarized light waves. We observe the anomalous polarization conversion of the opposite sign than that in a bulk medium or thick nanowires with a great enhancement of the degree of circular polarization attributed to the unconventional refraction in a nanowire medium. A rigorous simulation of the electric field polarization as a function of the wire diameter and spacing reveals the reversed polarization for a thin sparse wire array, in full quantitative agreement with experimental results.

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DO - 10.1103/PhysRevB.92.214436

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JF - Physical Review B - Condensed Matter and Materials Physics

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ER -

Anomalous polarization conversion in arrays of ultrathin ferromagnetic nanowires

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