We demonstrate a nonlinear metamaterial that can be switched between low and high transmission by controlling the power level of the incident beam. The origin of this nonlinear response is the superconducting Nb thin film employed in the metamaterial structure. We show that with moderate RF power of about 22 dBm it is possible to quench the superconducting state as a result of extremely strong current densities at the corners of the metamaterial's split-ring resonators. We measure a transmission contrast of 10 dB and a change in group delay of 70 ns between the low and high power states.
C. Kurter et al., "Switching Nonlinearity in a Superconductor-Enhanced Metamaterial," Applied Physics Letters, vol. 100, no. 12, pp. 121906-1-121906-3, American Institute of Physics (AIP), Mar 2012.
The definitive version is available at http://dx.doi.org/10.1063/1.3696297
Keywords and Phrases
High transmission; High-power; Incident beams; Metamaterial structures; Non-linear response; Non-Linearity; Power levels; Rf-power; Split-ring resonator; Superconducting state; Group delay; Superconductivity
International Standard Serial Number (ISSN)
Article - Journal
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