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Enhanced slow light in superconducting electromagnetically induced transparency metamaterials

We characterized and compared the electromagnetically induced transparency (EIT) response of superconducting niobium nitride (NbN) and NbN-Au hybrid metamaterials. In our design, the two resonators in a unit cell have strong coupling and are directly excited under terahertz (THz) radiation. A strong...

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Bibliographic Details
Published in:Superconductor science & technology 2013-07, Vol.26 (7), p.74004-5
Main Authors: Jin, B B, Wu, J B, Zhang, C H, Jia, X Q, Jia, T, Kang, L, Chen, J, Wu, P H
Format: Article
Language:English
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Summary:We characterized and compared the electromagnetically induced transparency (EIT) response of superconducting niobium nitride (NbN) and NbN-Au hybrid metamaterials. In our design, the two resonators in a unit cell have strong coupling and are directly excited under terahertz (THz) radiation. A stronger slow light effect was achieved using superconducting metamaterials than hybrid metamaterials. The enhanced slow light effect could be attributed to the remarkably low Ohmic loss and strong interaction of the resonators.
ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/26/7/074004