Self-tuning mechanisms of nonlinear split-ring resonators
Date
2007-10-04
Authors
Powell, David A.
Shadrivov, Ilya V.
Gorkunov, Maxim V.
Kivshar, Yuri
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American Institute of Physics (AIP)
Abstract
We study both theoretically and experimentally the dynamic tunability of the magnetic resonance of a single nonlinear split-ring resonator with varactor diode at microwave frequencies. We demonstrate different tuning regimes with and without an inductive coil in parallel with the varactor. We show that the coil changes the sign of the nonlinearity and eliminates the memory effect caused by charge accumulation across the varactor. In addition, at higher powers the nonlinear response of the split-ring resonator becomes multivalued, paving a way for creating bistable tunable metamaterials.
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Keywords: Dynamic tunability; Metamaterials; Nonlinear split-ring resonators; Self-tuning mechanisms; Dynamic analysis; Magnetic resonance; Microwave frequencies; Nonlinear systems; Varactors; Resonators
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Applied Physics Letters
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Journal article
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