Electromagnetic tunneling of obliquely-incident waves through a single-negative slab paired with a double-positive uniaxial slab

TL;DR

This paper demonstrates that under specific conditions, a single-negative slab can be perfectly tunneled through by pairing it with a double-positive uniaxial slab, enabling total transmission with zero phase delay.

Contribution

It provides analytical and numerical insights into the design principles and physical mechanisms enabling electromagnetic tunneling through paired negative and positive slabs.

Findings

Perfect tunneling occurs under oblique incidence and polarization.

Complete transmission with zero phase delay is achievable.

Design rules and physical mechanisms are elucidated.

Abstract

We show that, under appropriate oblique-incidence and polarization conditions, the inherent opaqueness of a homogeneous, isotropic single-negative slab may be perfectly compensated (in the ideal lossless case) by a homogenous, anisotropic (uniaxial) double-positive slab, so that complete tunneling (with total transmission and zero phase delay) occurs. We present an analytical and numerical study aimed at deriving the basic design rules, elucidating the underlying physical mechanisms, and exploring the role of the various involved parameters.