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Smith DR, Mock JJ, Starr AF, et al. Gradient index metamaterials. Phys Rev E Stat Nonlin Soft Matter Phys. 2005;71(3):036609doi: 10.1103/PhysRevE.71.036609.
Smith, D. R., Mock, J. J., Starr, A. F., & Schurig, D. (2005). Gradient index metamaterials. Physical review. E, Statistical, nonlinear, and soft matter physics, 71(3), 036609. https://doi.org/10.1103/PhysRevE.71.036609
Smith, D R, et al. "Gradient index metamaterials." Physical review. E, Statistical, nonlinear, and soft matter physics vol. 71,3 (2005): 036609. doi: https://doi.org/10.1103/PhysRevE.71.036609
Smith DR, Mock JJ, Starr AF, Schurig D. Gradient index metamaterials. Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Mar;71(3):036609. doi: 10.1103/PhysRevE.71.036609. Epub 2005 Mar 17. PMID: 15903607.
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Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Mar;71(3):036609. doi: 10.1103/PhysRevE.71.036609. Epub 2005 Mar 17.

Gradient index metamaterials.

Physical review. E, Statistical, nonlinear, and soft matter physics

D R Smith, J J Mock, A F Starr, D Schurig

Affiliations

  1. Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, USA. [email protected]

PMID: 15903607 DOI: 10.1103/PhysRevE.71.036609

Abstract

Metamaterials--artificially structured materials with tailored electromagnetic response--can be designed to have properties difficult or impossible to achieve with traditional materials fabrication methods. Here we present a structured metamaterial, based on conducting split ring resonators (SRRs), which has an effective index of refraction with a constant spatial gradient. We experimentally confirm the gradient by measuring the deflection of a microwave beam by a planar slab of the composite metamaterial over a range of microwave frequencies. The gradient index metamaterial may prove an advantageous alternative approach to the development of gradient index lenses and similar optics, especially at higher frequencies. In particular, the gradient index metamaterial we propose may be suited for terahertz applications, where the magnetic resonant response of SRRs has recently been demonstrated.

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