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Phys. Rev. Lett. 103, 147401 (2009) [4 pages]

Reconfigurable Terahertz Metamaterials

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Hu Tao1, A. C. Strikwerda2, K. Fan1, W. J. Padilla3, X. Zhang1,*, and R. D. Averitt2,†
1Department of Mechanical Engineering, Boston University, 110 Cummington Street, Boston, Massachusetts 02215, USA
2Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, USA
3Department of Physics, Boston College, 140 Commonwealth Avenue, Chestnut Hill, Massachusetts 02467, USA

Received 29 July 2009; revised 10 September 2009; published 2 October 2009

We demonstrate reconfigurable anisotropic metamaterials at terahertz frequencies where artificial “atoms” reorient within unit cells in response to an external stimulus. This is accomplished by fabricating planar arrays of split ring resonators on bimaterial cantilevers designed to bend out of plane in response to a thermal stimulus. We observe a marked tunability of the electric and magnetic response as the split ring resonators reorient within their unit cells. Our results demonstrate that adaptive metamaterials offer significant potential to realize novel electromagnetic functionality ranging from thermal detection to reconfigurable cloaks or absorbers.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.103.147401
DOI:
10.1103/PhysRevLett.103.147401
PACS:
78.20.Ci, 77.22.Ch, 78.47.−p

*xinz@bu.edu

†raveritt@physics.bu.edu

 
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