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Strongly birefringent metamaterials as negative index terahertz wave plates

Appl. Phys. Lett. 95, 171104 (2009); doi:10.1063/1.3253414

Published 27 October 2009

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P. Weis,1,2 O. Paul,1 C. Imhof,3 R. Beigang,1,2 and M. Rahm1,2
1Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Kaiserslautern 67663, Germany
2Fraunhofer Institute for Physical Measurement Techniques IPM, Freiburg 79110, Germany
3Department of Electrical and Computer Engineering, University of Kaiserslautern, Kaiserslautern 67663, Germany
We report an alternative approach for the design and fabrication of thin wave plates with high transmission in the terahertz regime. The wave plates are based on strongly birefringent cut-wire-pair metamaterials that exhibit refractive indices of opposite signs for orthogonal polarization components of an incident wave. As examples, we fabricated and investigated a quarter- and a half-wave plate with high intensity transmittance. The wave plates displayed a maximum figure of merit (FOM) of 23 at a frequency around 1.3 THz where the refractive index was n[prime]=−1.7. This corresponds to one of the highest FOMs reported at terahertz frequencies. ©2009 American Institute of Physics
History: Received 9 September 2009; accepted 1 October 2009; published 27 October 2009
Permalink: http://link.aip.org/link/?APPLAB/95/171104/1
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KEYWORDS and PACS

Keywords
PACS
  • 42.79.Ci
    Optical filters, zone plates, and polarizers
  • 78.20.Ci
    Optical constants
  • 42.70.-a
    Optical materials
  • 84.40.-x
    Radiowave and microwave technology
  • 78.20.Fm
    Birefringence (bulk materials/thin films)
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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