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We review some of our recent results on photonic metamaterials operating at optical frequencies. In a series of interferometric pulse propagation experiments on negative index metamaterials, we have demonstrated simultaneous negative phase and group velocity of light at 1.5 mum wavelength. By optimizing the structure parameters and utilizing silver instead of gold, the losses of the negative index...
We discuss second-harmonic generation experiments on planar arrays of magnetic split-ring resonators, using 150 fs pulses at 1.5 mum wavelength. Lithographic tuning reveals by far the largest signals when exciting the magnetic-dipole resonance.
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