Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 12, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3696297
Keywords
critical current density (superconductivity); metamaterials; niobium; superconducting resonators; superconducting thin films; type II superconductors
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Funding
- ONR [N00014-08-1-1058, 20101144225000, N00014-10-1-0925]
- U.S. DOE (High Energy Physics) [DESC0004950]
- ONR/UMD AppEl Center [D10, N00014-09-1-1190]
- CNAM
- U.S. DOE, Basic Energy Science, Division of Materials Sciences and Engineering [DE-AC02-07CH11358]
- European Community FET [213310]
- NASU
- Belgian American Educational Foundation
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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]
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