19 March 2010

Invisibility cloak

Scientific journal Science has reported that scientists have created a three-dimensional invisibility cloak. Abstract
Three-Dimensional Invisibility Cloak at Optical Wavelengths
Tolga Ergin,1,2,*,{dagger} Nicolas Stenger,1,2,* Patrice Brenner,2 John B. Pendry,3 Martin Wegener1,2,4

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

1 Institut für Angewandte Physik, Karlsruhe Institute of Technology (KIT), D-76128 Karlsruhe, Germany.
2 DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), D-76128 Karlsruhe, Germany.
3 Blackett Laboratory, Imperial College London, London SW7 2AZ, UK.
4 Institut für Nanotechnologie, Karlsruhe Institute of Technology (KIT), D-76021 Karlsruhe, Germany.

* These authors contributed equally to this work.

{dagger} To whom correspondence should be addressed. E-mail: tolga.ergin@kit.edu
See also BBC News.

There was no report of magic being involved at all.

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