Direct measurement of evanescent wave enhancement inside passive metamaterials.

Journal Article (Journal Article)

Electric-field measurements inside a negative-permeability-positive-permittivity metamaterial composed of arrays of split-ring resonators directly show that the theoretically predicted enhancement of evanescent waves in passive materials is physically realizable. To circumvent the extreme sensitivity of this phenomenon to the material parameters, we show how the basic phenomenon occurs under relaxed conditions for a single transverse wave number and use this approach in our measurements. Measurements of the spatial distribution of the electric field in a three-slab configuration confirm that the evanescent wave enhancement responsible for the subwavelength focusing effect occurs in an electromagnetic material in a manner in close agreement with theory.

Full Text

Duke Authors

Cited Authors

  • Popa, B-I; Cummer, SA

Published Date

  • January 25, 2006

Published In

Volume / Issue

  • 73 / 1 Pt 2

Start / End Page

  • 016617 -

PubMed ID

  • 16486305

Electronic International Standard Serial Number (EISSN)

  • 1550-2376

International Standard Serial Number (ISSN)

  • 1539-3755

Digital Object Identifier (DOI)

  • 10.1103/physreve.73.016617

Language

  • eng