Year: 2008
Type: article
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.
Source: Physical Review B
Authors: Andrea Alù, Nader Engheta
Institution: University of Pennsylvania
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2037578667