NDLI: Tunability of Superconducting Metamaterials

Content Provider	IEEE Xplore Digital Library
Author	Ricci, M.C. Hua Xu Prozorov, R. Zhuravel, A.P. Ustinov, A.V. Anlage, S.M.
Copyright Year	2002
Abstract	Metamaterials are artificial structures with unique electromagnetic properties, such as relative dielectric permittivity and magnetic permeability with values less than 1, or even negative. Because these properties are so sensitive to loss, we have developed metamaterials comprised of superconducting waveguides, wires, and split-ring resonators. An important requirement for applications of these metamaterials is the ability to tune the frequency at which the unique electromagnetic response occurs. In this paper we present three methods (unique to superconductors) to accomplish this tuning: temperature, dc magnetic field, and rf magnetic field. Data are shown for dc and rf magnetic field tuning of a single Nb split-ring resonator (SRR). It was found that the dc field tuning was hysteretic in the resonant frequency data, while the quality factor, was less hysteretic. The rf power tuning showed no hysteresis, but did show suppression of the at high power. Magneto-optical images reveal inhomogeneous magnetic vortex entry in the dc field tuning, and laser scanning photoresponse images for a YBa₂Cu₃O_7-6SRR reveals the current distribution in the rings.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	918
Ending Page	921
Page Count	4
File Size	539773
File Format	PDF
ISSN	10518223
Volume Number	17
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Metamaterials Laser tuning Magnetic materials Magnetic fields Magnetic hysteresis Superconducting filaments and wires Magnetic properties Dielectrics Permittivity Permeability superconductivity Left-handed metamaterial negative refraction
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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