Skip to main content
The Measured Electric Field Spatial Distribution within a Metamaterial Sub-Wavelength Cavity Resonator
Departmental Papers (ESE)
  • Thomas Hand, Duke University
  • Steven A Cummer, Duke University
  • Nader Engheta, University of Pennsylvania
Through experimental investigation, a thin subwavelength cavity resonator was physically realized using a bilayer structure composed of air and a negative permeability metamaterial structure one unit cell in thickness. We designed and built the metamaterial slab with periodic metallic ring structures and measured the spatial electric field magnitude in a cavity formed from this slab and a region of air, showing that a subwavelength cavity can be realized. The measured electric field magnitude distribution in the cavity matched very well with effective medium theory, showing that even a slab one unit cell in thickness may be effectively equivalent to a thin homogeneous medium as far as the construction of a sub-wavelength cavity is concerned, provided that the unit cell size is significantly smaller than the free space wavelength.
Document Type
Journal Article
Date of this Version
Copyright 2007 IEEE. Reprinted from IEEE Transactions on Antennas and Propagation, Volume 55, Issue 6, June 2007, pages 1781-1788.

This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Pennsylvania's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
  • cavity resonator,
  • metamaterials,
  • microwave cavities,
  • negative index of refraction,
  • negative permeability
Citation Information
Thomas Hand, Steven A Cummer and Nader Engheta. "The Measured Electric Field Spatial Distribution within a Metamaterial Sub-Wavelength Cavity Resonator" (2007)
Available at: