Phys. Rev. Lett. 100, 033903 (2008) [4 pages]Experimental Verification of Epsilon-Near-Zero Metamaterial Coupling and Energy Squeezing Using a Microwave WaveguideReceived 14 November 2007; revised 8 January 2008; published 25 January 2008 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. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.033903
DOI:
10.1103/PhysRevLett.100.033903
PACS:
41.20.Jb, 42.82.Et, 52.40.Db, 52.40.Fd
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