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Three-Dimensional Invisibility Cloak at Optical Wavelengths

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Science  16 Apr 2010:
Vol. 328, Issue 5976, pp. 337-339
DOI: 10.1126/science.1186351

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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°.

  • * These authors contributed equally to this work.

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