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Science. 2010 Apr 16;328(5976):337-9. doi: 10.1126/science.1186351. Epub 2010 Mar 18.

Three-dimensional invisibility cloak at optical wavelengths.

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  • 1Institut für Angewandte Physik, Karlsruhe Institute of Technology (KIT), D-76128 Karlsruhe, Germany. tolga.ergin@kit.edu

Abstract

We have designed and realized a three-dimensional invisibility-cloaking structure operating at optical wavelengths based on transformation optics. Our blueprint uses a woodpile photonic crystal with a tailored polymer filling fraction to hide a bump in a gold reflector. We fabricated structures and controls by direct laser writing and characterized them by simultaneous high-numerical-aperture, far-field optical microscopy and spectroscopy. A cloaking operation with a large bandwidth of unpolarized light from 1.4 to 2.7 micrometers in wavelength is demonstrated for viewing angles up to 60 degrees.

PMID:
20299551
[PubMed]
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