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

Three-dimensional invisibility cloak at optical wavelengths

Tolga Ergin  1 , Nicolas Stenger, Patrice Brenner, John B Pendry, Martin Wegener
Affiliations

Three-dimensional invisibility cloak at optical wavelengths

Tolga Ergin et al. Science. .

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.

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