Frequency tunable terahertz metamaterials using broadside coupled split-ring resonators
PHYSICAL REVIEW B, vol.83, no.19, 2011 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 83 Issue: 19
- Publication Date: 2011
- Doi Number: 10.1103/physrevb.83.193103
- Journal Name: PHYSICAL REVIEW B
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Open Archive Collection: AVESIS Open Access Collection
- Middle East Technical University Affiliated: Yes
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 displacement of the two SRR layers. For electrical excitation, the resonance frequency continuously redshifts as a function of displacement. The maximum frequency shift occurs for vertical displacement of half a unit cell, resulting in a shift of 663 GHz (51% of f(0)). We discuss the difference in the BC-SRR response for electrical excitation in comparison to magnetic excitation in terms of hybridization arising from inductive and capacitive coupling.