Abstract

This work is concerned with the experimental demonstration of a dual-band negative index metamaterial. The sample is double negative (showing both a negative effective permeability and a negative effective permittivity) for linearly polarized light with a wavelength between 799 and 818nm, and the real part of its refractive index is approximately 1.0 at 813nm. The ratio of Re(n)Im(n) is close to 1.3 at 813nm. For an orthogonal polarization, the same sample also exhibits a negative refractive index in the visible (at 772nm). The spectroscopic measurements of the material are in good agreement with the results obtained from a finite-element electromagnetic solver for the actual geometry of the fabricated sample at both polarizations.

© 2007 Optical Society of America

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