Squeezing electromagnetic energy with a dielectric split ring inside a permeability-near-zero metamaterial

TL;DR

This paper introduces a new method for electromagnetic energy concentration using a dielectric split ring within a permeability-near-zero metamaterial, enabling strong magnetic fields without resonance.

Contribution

It proposes a novel energy squeezing mechanism leveraging permeability-near-zero metamaterials and dielectric split rings, distinct from traditional resonance-based methods.

Findings

Energy stream density increases in narrow gaps

Magnetic field is significantly enhanced in the split ring

Method works with long and bent gaps

Abstract

A novel electromagnetic energy squeezing mechanism is proposed based on the special properties of permeability-near-zero metamaterials. Nearly no energy stream can enter a conventional dielectric region positioned inside a permeability-near-zero material. When a source is surrounded by a dielectric split ring (encloser with a gap opened), the electromagnetic energy generated by the source is forced to propagate through the gap. When the gap is narrow, the energy stream density becomes very large and makes the magnetic field enhanced drastically in the gap. The narrow gap can be long and bended. This provides us a method to obtain strong magnetic field without using resonance enhancement.