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Nano Lett. 2010 Jul 14;10(7):2480-3. doi: 10.1021/nl100943e.

Negative-index metamaterials: looking into the unit cell.

Author information

1
Center for Nanophotonics, FOM Institute for Atomic and Molecular Physics (AMOLF), Amsterdam, The Netherlands. burresi@lens.unifi.it

Abstract

With their potential for spectacular applications, like superlensing and cloaking, metamaterials are a powerful class of nanostructured materials. All these applications rely on the metamaterials acting as a homogeneous material. We investigate a negative index metamaterial with a phase-sensitive near-field microscope and measure the optical phase as a function of distance. Close to the metamaterial we observe extremely large spatial phase variations within a single unit cell which vanish on a 200 nm length scale from the sample. These deviations of a state-of-the-art metamaterial from a homogeneous medium can be important for nanoscale applications.

PMID:
20518537
DOI:
10.1021/nl100943e

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