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

Research output: Contribution to journalArticlepeer-review

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 languageEnglish
Article number214436
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number21
DOIs
StatePublished - 28 Dec 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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