Invisibility cloaking in a diffusive light scattering medium

@article{Schittny2014InvisibilityCI,
  title={Invisibility cloaking in a diffusive light scattering medium},
  author={Robert Schittny and Muamer Kadic and Tiemo B{\"u}ckmann and Martin Wegener},
  journal={Science},
  year={2014},
  volume={345},
  pages={427 - 429}
}
To cast no shadow in a murky medium Cloaks can hide objects from view, but what about their shadows? Schittny et al. devised a cloak to remove even the shadow of an object embedded in a murky medium in front of a computer screen (see the Perspective by Smith). They engineered a core-shell structure within which an object could be hidden and tailored the optical properties of the cloak to match that of the medium. Light was routed around the cloak, leaving no trace of the hidden object. Science… 

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References

SHOWING 1-10 OF 26 REFERENCES

Macroscopic invisibility cloaking of visible light

The first realization of a macroscopic volumetric invisibility cloak constructed from natural birefringent crystals is reported, capable of hiding, for a specific light polarization, three-dimensional objects of the scale of centimetres and millimetres.

Broadband Ground-Plane Cloak

An experimental realization of a cloak design that conceals a perturbation on a flat conducting plane, under which an object can be hidden, and results indicate that this type of cloak should scale well toward optical wavelengths.

Three-Dimensional Invisibility Cloak at Optical Wavelengths

A three-dimensional invisibility-cloaking structure operating at optical wavelengths based on transformation optics is designed and realized and uses a woodpile photonic crystal with a tailored polymer filling fraction to hide a bump in a gold reflector.

Dielectric Optical Cloak

Invisibility or cloaking has captured human’s imagination for many years. With the recent advancement of metamaterials, several theoretical proposals show cloaking of objects is possible, however, so

An optical cloak made of dielectrics.

The optical 'carpet' cloak is designed using quasi-conformal mapping to conceal an object that is placed under a curved reflecting surface by imitating the reflection of a flat surface and enables broadband and low-loss invisibility at a wavelength range of 1,400-1,800 nm.

Silicon nanostructure cloak operating at optical frequencies

The ability to render objects invisible using a cloak (such that they are not detectable by an external observer) has long been a tantalizing goal1,2,3,4,5,6. Here, we demonstrate a cloak operating

Optical Conformal Mapping

A general recipe for the design of media that create perfect invisibility within the accuracy of geometrical optics is developed, which can be applied to escape detection by other electromagnetic waves or sound.

On perfect cloaking.

It is shown in principle how to cloak a region of space to make its contents classically invisible or transparent to waves, and any active scheme should detectable by a quantum probe, regardless of bandwidth.

Experimental demonstration of a bilayer thermal cloak.

A bilayer thermal cloak made of bulk isotropic materials is demonstrated, and it has been validated as an exact cloak and the robustness of this scheme is validated in both 2D (including oblique heat front incidence) and 3D configurations.

Optical phase cloaking of 700 nm light waves in the far field by a three-dimensional carpet cloak.

Far-field cloaking of the light phase is demonstrated by interferometric microscope-imaging experiments on the previously introduced three-dimensional carpet cloak at 700 nm wavelength and for arbitrary polarization of light.