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Phys Rev Lett. 2007 Aug 3;99(5):057202. Epub 2007 Jul 30.

Simulations of ferrite-dielectric-wire composite negative index materials.

Author information

  • 1Code 6365, Naval Research Laboratory, Washington, D.C. 20375, USA.

Abstract

We perform extensive finite difference time domain simulations of ferrite based negative index of refraction composites. A wire grid is employed to provide negative permittivity. The ferrite and wire grid interact to provide both negative and positive index of refraction transmission peaks in the vicinity of the ferrite resonance. Notwithstanding the extreme anisotropy in the index of refraction of the composite, negative refraction is seen at the composite air interface allowing the construction of a focusing concave lens with a magnetically tunable focal length.

PMID:
17930783
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