Experimental Verification of Epsilon-Near-Zero Metamaterial Coupling and Energy Squeezing Using a Microwave Waveguide

Brian Edwards, Andrea Alù, Michael E. Young, Mário Silveirinha, and Nader Engheta
Phys. Rev. Lett. 100, 033903 – Published 25 January 2008
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Abstract

Utilizing a microwave setup, we experimentally verify our recently developed theory of energy squeezing and tunneling [Phys. Rev. Lett. 97, 157403 (2006)] through an ultranarrow waveguide channel that mimics zero-permittivity properties. Exploiting the infinite phase velocity supported by a waveguide transition section at cutoff, we test our theory of tunneling in this zero-permittivity region without use of resonant inclusions. This “supercoupling” is shown to have unique anomalous properties: an almost uniform phase along the narrow channel and weak dependence over its geometry.

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  • Received 14 November 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.033903

©2008 American Physical Society

Authors & Affiliations

Brian Edwards1, Andrea Alù1, Michael E. Young1, Mário Silveirinha1,2, and Nader Engheta1,*

  • 1Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104 USA
  • 2Department of Electrical Engineering, Instituto de Telecomunicações,Universidade de Coimbra, 3030 Coimbra, Portugal

  • *To whom all correspondence should be addressed. engheta@ee.upenn.edu

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Vol. 100, Iss. 3 — 25 January 2008

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