Abstract
We acknowledge financial support from the Engineering and Physical Sciences Research Council (EPSRC) of the United Kingdom, via the EPSRC Centre for Doctoral Training in Metamaterials (Grant No. EP/L015331/1). W.L.B. acknowledges the support of the European Research Council through project Photmat (ERC-2016-AdG-742222). I.R.H. acknowledges support from the EPSRC via the TEAM-A prosperity partnership (Grant No. EP/L015331/1).
Highlights
The fabrication of structures that can achieve electromagnetic properties not found in nature has been an exciting topic of research for many years, perhaps beginning with Lamb’s consideration of a wave with a backward group velocity in 1904 [1]
This coupling has led to studies on the effects of the spacing and relative orientation of split-ring resonator (SRR) in one, two, and threedimensional arrays [8,9,10,11,12,13,14,15,16]
In this paper we investigate the coupling between an active tunable split-ring resonator and an adjacent passive SRR as a function of their separation and relative orientation
Summary
The fabrication of structures that can achieve electromagnetic properties not found in nature has been an exciting topic of research for many years, perhaps beginning with Lamb’s consideration of a wave with a backward group velocity in 1904 [1]. While the field of metamaterials has continued to grow [2,3,4], one of the early components of metamaterials, the split-ring resonator (SRR), is still in common use as a “meta-atom.”. Dynamical tuning would allow for functionality over a range of frequencies without sacrificing the benefits of selectivity offered by a narrow-band response. Such tuning has been achieved structurally [19,20] by using the relationship between near-field interactions of the rings and their relative positions to tune the resonant response.
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