Frequency Tunable Metamaterial Designs Using Near Field Coupled SRR Structures in the Terahertz Region

Ekmeki E., Strikwerda A. C., Fan K., Keiser G., Zhang X., Turhan-Sayan G., ...More

36th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Texas, United States Of America, 2 - 07 October 2011 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • City: Texas
  • Country: United States Of America
  • Middle East Technical University Affiliated: Yes

Abstract

We present frequency tunable metamaterials at terahertz frequencies using broadside-coupled split ring resonators (BC-SRRs). Frequency tuning, arising from changes in near field coupling, is obtained by in-plane displacement between the SRR layers. For electrical excitation, the resonance frequency continuously redshifts as a function of displacement. A maximum frequency shift occurs for displacement of half a unit cell resulting in a shift of 663 GHz (51% of f0). 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.