Phys. Rev. Lett. 97, 157403 (2006) [4 pages]Tunneling of Electromagnetic Energy through Subwavelength Channels and Bends using ε-Near-Zero MaterialsReceived 23 March 2006; published 10 October 2006 In this Letter, we demonstrate theoretically that electromagnetic waves can be “squeezed” and tunneled through very narrow channels filled with ε-near-zero (ENZ) materials. We show that the incoming planar wave front is replicated at the output interface, independently of the specific geometry of the channel. A closed analytical formula is derived for the scattering parameters of a particular class of geometries. It is discussed that in some cases the isotropy of the ENZ material may not be an issue. A metamaterial realization of an anisotropic ENZ material is suggested and numerically studied. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.97.157403
DOI:
10.1103/PhysRevLett.97.157403
PACS:
78.66.Sq, 42.82.Et, 52.40.Db, 52.40.Fd
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