Anomalous polarization conversion in arrays of ultrathin ferromagnetic nanowires

Article

关键词: HYPERBOLIC METAMATERIALS;    MODES;    LIGHT;    EXCITATION;    SCATTERING;   

DOI  :  10.1103/PhysRevB.92.214436

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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