Switching nonlinearity in a superconductor-enhanced metamaterial

Details Switching nonlinearity in a superconductor-enhanced metamaterial Switching nonlinearity in a superconductor-enhanced metamaterial

2011-10-25

arxiv.org/abs/1110.5677v2

Appl. Phys. Lett. 100, 121906 (2012)

Physics

Condensed Matter

Materials Science

4 pages, 4 figures

Scientific paper

10.1063/1.3696297

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.

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