Frequency-tunable metamaterials using broadside-coupled split ring resonators
Optics
2015-05-19 v1
Abstract
We present frequency tunable metamaterial designs at terahertz (THz) frequencies using broadside-coupled split ring resonator (BC-SRR) arrays. Frequency tuning, arising from changes in near field coupling, is obtained by in-plane horizontal or vertical displacements of the two SRR layers. For electrical excitation, the resonance frequency continuously redshifts as a function of displacement. The maximum frequency shift occurs for displacement of half a unit cell, with vertical displacement resulting in a shift of 663 GHz (51% of f0) and horizontal displacement yielding a shift of 270 GHz (20% of f0). We also discuss the significant differences in tuning that arise for electrical excitation in comparison to magnetic excitation of BC-SRRs.
Cite
@article{arxiv.1008.2195,
title = {Frequency-tunable metamaterials using broadside-coupled split ring resonators},
author = {Evren Ekmekci and Andrew C. Strikwerda and Kebin Fan and Xin Zhang and Gonul Turhan-Sayan and Richard D. Averitt},
journal= {arXiv preprint arXiv:1008.2195},
year = {2015}
}