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 around 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 . 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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