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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.
electromagnetic wave propagation, radiowave propagation, optical waveguides, couplers, and arrays (integrated optics), electromagnetic (nonlaser) radiation interactions with plasma, plasma interactions with antennas, plasma-filled waveguides
Date Posted: 20 March 2008
This document has been peer reviewed.