Three-dimensional isotropic metamaterial consisting of domain-structure

Boyi Gong, Xiaopeng Zhao

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Whether an artificially designed negative-index structure could be regarded as a homogeneous medium or not rests with the ratio of its structural unit (man-made atom) over the operation wavelength. However, this definition is ambiguous, and usually the ratio is too large to rigorously meet the effective medium theory. In this paper a three-dimensional (3D) isotropic structure is presented which is obtained from a two-dimensional (2D) isotropic structure rotating on its axis for a circle, and the material is silver. Numerical studies confirm that both the 2D and 3D structures can realize a negative refractive index at microwave wavelengths. Observing the monitored surface current distributions and analogizing the molecular current and the magnetic domain, we suggest a new concept of domain-structure to explain the interior structure of this metamaterial, and finally conclude that the 3D structure is a kind of domain-structured and isotropic metamaterial.

Original languageEnglish
Pages (from-to)1034-1037
Number of pages4
JournalPhysica B: Condensed Matter
Volume407
Issue number6
DOIs
StatePublished - 15 Mar 2012

Keywords

  • Domain-structure
  • Negative-index
  • Structural unit

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