Experimental verification of isotropic and polarization properties of high permittivity-based metamaterial

Fuli Zhang, Qian Zhao, Lei Kang, Ji Zhou, Didier Lippens

    Research output: Contribution to journalArticle

    27 Scopus citations

    Abstract

    We report on the experimental verification of isotropy and polarization properties of high-permittivity metamaterial composed of cubic ferroelectric resonators. Barium strontium titanate (BST) with permittivity as high as 850 is used as ferroelectrics material so that the metamaterial condition is fulfilled. The isotropy was investigated via the scattering of an electromagnetic wave under tilted incidence. From the experimental data, we observed that the magnetic resonance, at 8.6 GHz for a millimeter cube size, is independent of the incidence angle for the TM and TE polarizations. For the latter, however, an extra dip in the transmittance at higher frequency (10.7 GHz for a period of 1.2 mm), not evident under normal incidence, is found. By comparing the full wave simulations of microstructured and homogenous metamaterial slabs it is shown that the electromagnetic response is independent of the underlying structuring technique. On this basis, we verified that this extra dip, theoretically predicted by for a three-dimensional split ring resonator technology, results from the permeability dispersion characteristics of BST cubes, with zero transmittance at the magnetic plasma frequency.

    Original languageEnglish (US)
    Article number195119
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume80
    Issue number19
    DOIs
    StatePublished - Nov 30 2009

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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