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Dynamic response of metamaterials in the terahertz regime: Blueshift tunability and broadband phase modulation

Source: Appl. Phys. Lett. 96, 021111 (2010); doi:10.1063/1.3292208

Published 15 January 2010

KEYWORDS and PACS
Keywords
PACS
  • 78.70.Gq
    Microwave and radio-frequency interactions with condensed matter
  • 78.67.Pt
    Optical properties of multilayers and superlattices
  • 42.70.-a
    Optical materials
  • 78.47.J-
    Ultrafast pump/probe spectroscopy (<1 ps) in condensed matter
  • YEAR: 2010
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PUBLICATION DATA
ISSN:
1553-9601 (online)
Publisher:
AIP is a member of CrossRef AIP
J.-M. Manceau,1 N.-H. Shen,1 M. Kafesaki,1,2 C. M. Soukoulis,1,2,3 and S. Tzortzakis1
1Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology–Hellas (FORTH), P.O. Box 1527, 71110 Heraklion, Greece
2Department of Materials Science and Technology, University of Crete, 71003 Heraklion, Greece
3Department of Physics and Astronomy and Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA
Terahertz time-domain spectroscopy is used to probe the electromagnetic properties of metamaterials, which are dynamically photoexcited, using synchronized femtosecond near-infrared laser pulses. Blueshift tunability of the electric dipole metamaterial's resonance, as well as a broadband phase tunability reaching ~pi/4, are demonstrated. Numerical simulations show the observations are due to changes in the complex index of the photoexcited semiconductor substrate. ©2010 American Institute of Physics
History: Received 2 September 2009; accepted 22 December 2009; published 15 January 2010
Permalink: http://link.aip.org/link/?APPLAB/96/021111/1

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