Continuously tunable terahertz metamaterial employing magnetically actuated cantilevers
- 14 March 2011
- journal article
- research article
- Published by Optica Publishing Group in Optics Express
- Vol. 19 (7) , 5741-5752
Abstract
Terahertz metamaterial structures that employ flexing microelectromechanical cantilevers for tuning the resonance frequency of an electric split-ring resonator are presented. The tuning cantilevers are coated with a magnetic thin-film and are actuated by an external magnetic field. The use of cantilevers enables continuous tuning of the resonance frequency over a large frequency range. The use of an externally applied magnetic field for actuation simplifies the metamaterial structure and its use for sensor or filter applications. A structure for minimizing the actuating field is derived. The dependence of the tunable bandwidth on frequency is discussed.Keywords
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