Metamaterial tuning by manipulation of near-field interaction

TL;DR

This paper presents a method to analyze and manipulate near-field interactions between resonant elements in metamaterials, enabling tunable electromagnetic responses through configuration adjustments.

Contribution

It introduces a calculation method for near-field interaction coefficients and demonstrates how adjusting element configurations tunes metamaterial properties.

Findings

Near-field interaction coefficients can be accurately calculated.

Adjusting split ring resonator configurations tunes metamaterial response.

Experimental microwave metamaterial tuning is explained by the analysis.

Abstract

We analyze the near-field interaction between the resonant sub-wavelength elements of a metamaterial, and present a method to calculate the electric and magnetic interaction coefficients. We show that by adjusting the relative configuration of the neighboring split ring resonators it becomes possible to manipulate this near-field interaction, and thus tune the response of metamaterials. We use the results of this analysis to explain the experimentally observed tuning of microwave metamaterials.