Dielectric sensing in ε-near-zero narrow waveguide channels

被引：154

作者：

Alu, Andrea ^{[1
]}

Engheta, Nader ^{[1
]}

机构：

[1] Univ Penn, Dept Elect & Syst Engn, Philadelphia, PA 19104 USA

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.78.045102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：5

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