Switching nonlinearity in a superconductor-enhanced metamaterial

TitleSwitching nonlinearity in a superconductor-enhanced metamaterial
Publication TypeJournal Article
Year of Publication2012
AuthorsKurter C, Tassin P, Zhuravel AP, Zhang L, Koschny T, Ustinov AV, Soukoulis CM, Anlage SM
Journal TitleApplied Physics Letters
Date Published03
Type of ArticleArticle
ISBN Number0003-6951
Accession NumberWOS:000302228700029
Keywordscritical current density (superconductivity), metamaterials, microwave devices, negative-index metamaterials, niobium, optical, refraction, split-ring resonators, superconducting resonators, superconducting thin films, superconductors, type II

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) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3696297]

URL<Go to ISI>://WOS:000302228700029
Alternate JournalAppl. Phys. Lett.