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Tunable terahertz metamaterials with negative permeability

Abstract : We demonstrate experimentally and theoretically dielectric metamaterials exhibiting a tunable range of negative effective permeability in the terahertz spectral region (0.2–0.36 THz). Our structures consist of an array of intrinsically nonmagnetic rods made of an incipient ferroelectric SrTiO_3 which shows a high tunable permittivity. The magnetic response and its tuning are achieved by a temperature control of the permittivity of SrTiO_3, which defines the resonant confinement of the electromagnetic field within the rods.
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Submitted on : Tuesday, July 27, 2010 - 3:30:18 PM
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H. Nemec, P. Kuzel, F. Kadlec, Christelle Kadlec, R. Yahiaoui, et al.. Tunable terahertz metamaterials with negative permeability. Physical Review B: Condensed Matter and Materials Physics, American Physical Society, 2009, 79 (24), pp.241108 (1-4). ⟨10.1103/PhysRevB.79.241108⟩. ⟨hal-00506380⟩



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