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 SrTiO3 which shows a high tunable permittivity. The magnetic response and its tuning are achieved by a temperature control of the permittivity of SrTiO3 , which defines the resonant confinement of the electromagnetic field within the rods.
- Publication:
-
Physical Review B
- Pub Date:
- June 2009
- DOI:
- Bibcode:
- 2009PhRvB..79x1108N
- Keywords:
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- 42.25.Bs;
- 77.84.-s;
- 78.20.Bh;
- 78.20.Ci;
- Wave propagation transmission and absorption;
- Dielectric piezoelectric ferroelectric and antiferroelectric materials;
- Theory models and numerical simulation;
- Optical constants