Frequency-tunable metamaterials using broadside-coupled split ring resonators

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.

References in corpus (3)

• Structural tunability in metamaterials
• Metamaterial tuning by manipulation of near-field interaction
• Terahertz Metamaterials with Semiconductor Split-Ring Resonators for Magnetostatic Tunability

Cited by in corpus (4)

• Energy Coupled Mode Theory for an arbitrary number of resonators
• Structural Control of Metamaterial Oscillator Strength and Electric Field Enhancement at Terahertz Frequencies
• Decoupling Crossover in Asymmetric Broadside Coupled Split Ring Resonators at Terahertz Frequencies
• Structurally Tunable Nonlinear Terahertz Metamaterials using Broadside Coupled Split Ring Resonators