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Theory of supercoupling, squeezing wave energy, and field confinement in narrow channels and tight bends using<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ε</mml:mi></mml:math>near-zero metamaterials
In this work, we investigate the detailed theory of the supercoupling, anomalous tunneling effect, and field confinement originally identified by Silveirinha and Engheta [Phys. Rev. Lett. 97, 157403 (2006)], where we demonstrated the possibility of using materials with permittivity $\ensuremath{\epsilon}$ near zero to drastically improve the transmission of electromagnetic energy …