1. Anomalous polarization conversion in arrays of ultrathin ferromagnetic nanowires.
- Author
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Stashkcvich, Andrey A., Roussigné, Yves, Poddubny, Alexander N., Chérif, S.-M., Zheng, Y., Vidal, Franck, Yagupov, Ilya V., Slobozhanyuk, Alexei P., Belov, Pavel A., and Kivshar, Yuri S.
- Subjects
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POLARIZATION (Electricity) , *FERROMAGNETISM , *ELECTRIC properties of nanowires , *BRILLOUIN scattering , *ELECTRIC fields - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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