volume 87, issue 2, P143-150 2007
DOI: 10.1007/s00339-006-3834-3
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Abstract: Abstract.Two types of optical metamaterials operating at near-IR and mid-IR frequencies, respectively, have been designed, fabricated by nanoimprint lithography (NIL), and characterized by laser spectroscopic ellipsometry. The structure for the near-IR range was a metal/dielectric/metal stack "fishnet" structure that demonstrated negative permittivity and permeability in the same frequency region and hence exhibited a negative refractive index at a wavelength near 1.7 µm. In the mid-IR range, the metamaterial…

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