Tunable terahertz metamaterials by means of piezoelectric MEMS actuators
Department of Electrical and Computer Engineering, Aristotle University of Thessaloniki 54124 Thessaloniki, Greece
Received: 19 June 2014
Accepted: 14 August 2014
A programmable THz metamaterial, derived from the utilisation of a piezoelectric controlled microgripper as a split-ring resonator (SRR), is introduced in this paper. By applying the appropriate actuation voltage on the piezoelectric microelectromechanical systems (MEMS), a reconfigurable complex medium, offering enhanced bandwidth tunability, is attained. Several polarisation topologies are examined in order to clarify the interesting attributes of the metamaterial. Finally, thorough numerical investigations, via a robust finite element method (FEM), support the efficiency and reveal the advantages and applicability of the proposed device.
PACS: 85.85.+j – Micro- and nano-electromechanical systems (MEMS/NEMS) and devices / 41.20.Jb – Electromagnetic wave propagation; radiowave propagation / 77.65.-j – Piezoelectricity and electromechanical effects
© EPLA, 2014