Transmission-Line Analysis of Epsilon-Near-Zero (ENZ)-Filled Narrow Channels

Abstract

Following our recent interest in metamaterial-based devices supporting resonant tunneling, energy squeezing and supercoupling through narrow waveguide channels and bends, here we analyze the fundamental physical mechanisms behind this phenomenon using a transmission-line model. These theoretical findings extend our theory, allowing us to take fully into account frequency dispersion and losses and revealing the substantial differences between this unique tunneling phenomenon and higher-frequency Fabry-Perot resonances. Moreover, they represent the foundations for other possibilities to realize tunneling through arbitrary waveguide bends, both in E and H planes of polarization, waveguide connections and sharp abruptions and to obtain analogous effects with geometries arguably simpler to realize.

35 pages, 9 figures

References in corpus (3)

• Achieving transparency with plasmonic coatings
• Epsilon-Near-Zero (ENZ) Metamaterials and Electromagnetic Sources: Tailoring the Radiation Phase Pattern
• Theory of Supercoupling, Squeezing Wave Energy, and Field Confinement in Narrow Channels and Tight Bends Using Epsilon-Near-Zero Metamaterials

Cited by in corpus (7)

• Digital Metamaterials
• Reflectionless Sharp Bends and Corners in Waveguides Using Epsilon-Near-Zero Effects
• Optical Tunneling through Arbitrarily-Shaped Plasmonic Channels and Sharp Bends
• Nonlinear Control of Tunneling Through an Epsilon-Near-Zero Channel
• Electromagnetic Composites: from Effective Medium Theories to Metamaterials
• Exceptional points and spectral singularities in active epsilon-near-zero plasmonic waveguides
• Controlling collective spontaneous emission with plasmonic waveguides