Low-loss negative-index metamaterial at telecommunication wavelengths (original) (raw)
- Optics Letters
- Vol. 31,
- Issue 12,
- pp. 1800-1802
- (2006)
- •https://doi.org/10.1364/OL.31.001800
Author Information
Author Affiliations
Gunnar Dolling,1Christian Enkrich,1Martin Wegener,1Costas M. Soukoulis,2and Stefan Linden3
1Institut für Angewandte Physik, Universität Karlsruhe (TH), Wolfgang-Gaede-Straße 1, D-76131 Karlsruhe, Germany
2Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011
3Institut für Nanotechnologie, Forschungszentrum Karlsruhe in der Helmholtz-Gemeinschaft, Postfach 3640, D-76021 Karlsruhe, Germany
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Abstract
We fabricate and characterize a low-loss silver-based negative-index metamaterial based on the design of a recent theoretical proposal. Comparing the measured transmittance and reflectance spectra with theory reveals good agreement. We retrieve a real part of the refractive index of Re(n)=−2 around 1.5 μm wavelength. The maximum of the ratio of the real to the imaginary part of the refractive index is about three at a spectral position where Re(n)=−1. To the best of our knowledge, this is the best figure of merit reported for any negative-index photonic metamaterial to date.
© 2006 Optical Society of America
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