Rotational tuning of interaction in metamaterials

TL;DR

This paper demonstrates how rotating elements in metamaterials can tune their electromagnetic interactions, leading to resonance crossings and degeneracies, which are explained through near-field interaction analysis.

Contribution

It introduces a method to tune metamaterials via rotational adjustments, revealing resonance crossing phenomena not previously observed.

Findings

Resonance crossing and degeneracy observed through rotation.

Interaction between magnetic and electric near-fields explains the effect.

Verification through interaction energy calculations.

Abstract

We experimentally observe the tuning of metamaterials through the relative rotation of the elements about their common axis. In contrast to previous results we observe a crossing of resonances, where the symmetric and anti-symmetric modes become degenerate. We associate this effect with an interplay between the magnetic and electric near-field interactions and verify this by calculations based on the interaction energy between resonators.