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Updated: Jul 11, 2025

Fabrication of Nanopillar-Based Split Ring Resonators for Displacement Current Mediated Resonances in Terahertz Metamaterials
Published on: March 23, 2017
Tailoring the dispersion characteristics in planar arrays of discrete and coalesced split ring resonators
Ioannis Spanos1, Christopher John Stevens2, Laszlo Solymar2
1Department of Engineering Science, University of Oxford, Parks Road, Oxford, OX1 3PJ, UK. ioannis.spanos@seh.ox.ac.uk.
Abstract:
In this report, the coupling and dispersion characteristics of discrete and coalesced square resonators was investigated in the MHz regime. Resonators with one and three gaps were considered. When the resonators are not in direct contact, the number of gaps has little effect upon the total coupling, which is negative. When the resonators are connected so that they share one side, the coupling can change drastically depending on the number of gaps. In particular, when the shared side has a gap, the total coupling coefficient switches to positive values, making it possible for forward travelling waves to propagate on arrays. Experimental, numerical and analytical data verify this behaviour.
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