Summary: Miniaturized superconducting metamaterials for radio frequencies
and Steven M. Anlage1
Department of Physics, Center for Nanophysics and Advanced Materials, University of Maryland,
College Park, Maryland 20742-4111, USA
Department of Electrical and Computer Engineering, University of Maryland, College Park,
Maryland 20742-3285, USA
Received 3 April 2010; accepted 2 June 2010; published online 24 June 2010
We have developed a low-loss, ultrasmall radio frequency rf metamaterial operating at 76 MHz.
This miniaturized medium is made up of planar spiral elements with diameter as small as /658
is the free space wavelength , fashioned from Nb thin films on quartz substrates. The
transmission data are examined below and above the superconducting transition temperature of Nb
for both a single spiral and a one dimensional array. The validity of the design is tested through
numerical simulations and good agreement is found. We discuss how superconductors enable such
a compact design in the rf with high loaded-quality factor in excess of 5000 , which is in fact
difficult to realize with ordinary metals. © 2010 American Institute of Physics.