Negative-index metamaterial at 780 nm wavelength

We further miniaturize a recently established silver-based negative-index metamaterial design. By comparing transmittance, reflectance, and phase-sensitive time-of-flight experiments with theory, we infer a real part of the refractive index of −0.6 at a 780 nm wavelength—which is visible in the laboratory.

• DF
  Deutsche Forschungsgemeinschaft
• UO
  University of Crete
• DA
  Defense Advanced Research Projects Agency