Dielectric Sensing in E-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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 03, 2008
- Accession Number
- ADA519123
Entities
People
- Andrea Alù
- Nader Engheta
Organizations
- University of Pennsylvania