Dielectric Sensing in Epsilon-Near-Zero Narrow Waveguide Channels

Abstract

We exploit here the dramatic field enhancement caused by energy squeezing and tunneling (i.e., 'supercoupling') in metamaterial-inspired ultranarrow waveguide channels with near zero effective permittivity in order to sense small permittivity variations in a tiny object. The supercoupling effect is accurately modeled analytically and closed form expressions are derived to describe the presence of defects or permittivity perturbations along the channel. Applications for tailoring its pass-band frequency and for high-Q sensing are proposed at microwave frequencies.

15 pages, 4 figures

References in corpus (2)

• Design of Matched Zero-Index Metamaterials Using Non-Magnetic Inclusions in Epsilon-Near-Zero (ENZ) Media
• Metamaterial covers over a small aperture

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• Reflectionless Sharp Bends and Corners in Waveguides Using Epsilon-Near-Zero Effects
• Realizing bending waveguides with anisotropic epsilon-near-zero metamaterials
• Enhanced Super-Radiance in Epsilon-Near-Zero Plasmonic Channels
• Tunneling of Obliquely-Incident Waves through PT-Symmetric Epsilon-Near-Zero Bi-Layers
• Plasmonics without negative dielectrics
• Nonlinear Control of Tunneling Through an Epsilon-Near-Zero Channel
• Vibrational Coupling to Epsilon-Near-Zero Waveguide Modes
• Squeezing electromagnetic energy with a dielectric split ring inside a permeability-near-zero metamaterial
• Experimental Verification of Below-Cutoff Propagation in Miniaturized Circular Waveguides Using Anisotropic ENNZ Metamaterial Liners
• Abnormal enhancement of electric field inside a thin permittivity-near-zero object in free space
• Exact modes, hybridization and polarization rotation of electromagnetic fields propagating in topological insulating slab