Hiding a Realistic Object Using a Broadband Terahertz Invisibility Cloak

@article{Zhou2011HidingAR,
  title={Hiding a Realistic Object Using a Broadband Terahertz Invisibility Cloak},
  author={F. Zhou and Yongjun Bao and Wei Cao and Colin T. Stuart and Jianqiang Gu and Weili Zhang and Cheng Sun},
  journal={Scientific Reports},
  year={2011},
  volume={1}
}
The invisibility cloak has been a long-standing dream for many researchers over the decades. Using transformation optics, a three-dimensional (3D) object is perceived as having a reduced number of dimensions, making it “undetectable” judging from the scattered field12345. Despite successful experimental demonstration at microwave and optical frequencies6789101112, the spectroscopically important Terahertz (THz) domain13141516 remains unexplored due to difficulties in fabricating cloaking… 

Three-dimensional invisibility cloaks functioning at terahertz frequencies

Quasi-three-dimensional invisibility cloaks, comprised of either homogeneous or inhomogeneous media, are experimentally demonstrated in the terahertz regime. The inhomogeneous cloak was

Additive Manufacturing of a 3D Terahertz Gradient‐Refractive Index Lens

cloaking devices was then reported by Wegener’s group using directly laser writing process employing two-photon polymerization and later stimulated emission depletion principle in achieving deep

A self-assembled three-dimensional cloak in the visible

The invisibility cloak and the way it was fabricated opens an avenue for many spectacular nanooptical applications such as non-disturbing sensors and photo-detectors, highly efficient solar cells, or optical nanoantenna arrays with strongly suppressed cross-talk to mention only a few.

Broadband diffusion of terahertz waves by multi-bit coding metasurfaces

The proposed method offers a new way to control scattering of terahertz waves and can be implemented using conventional lithography, and it is shown that multi-bit coding metasurfaces have strong abilities to control teraHertz waves by designing-specific coding sequences.

Hyperbolic Bismuth–Dielectric Structure for Terahertz Photonics

Hyperbolic medium is a special class of strongly anisotropic materials described by diagonal permittivity tensor with the principal components being of the opposite signs, which results in a

Multifunctional reflective dielectric metasurface in the terahertz region.

It is verified that the multifunctional dielectric coding metasurface provides a new way to control the reflection of terahertz waves.

Bidirectional Perfect Absorber Using Free Substrate Plasmonic Metasurfaces

Much effort has been made to achieve metasurface absorbers with polarization‐insensitive, wide‐angle, multiband, or broadband performance from gigahertz to terahertz to optical ranges. However, there

Perfect invisible terahertz cloak

A novel invisible media based on transformation optics consisting of three regions to investigate invisibility was proposed here. What the media does is to compress the light to a small region so

Ultrasensitive sensing with three-dimensional terahertz metamaterial absorber

Planar metasurfaces and metamaterial absorbers have shown great promise for label-free sensing applications at microwaves, optical and terahertz frequencies. The realization of high-quality-factor

Active Cloaking of a Non-Uniform Scatterer

The design and experimental demonstration of a low-profile, active cloak capable of concealing a complex, metallic, polygonal target is presented and demonstrates the feasibility of this kind of active cloaking for more complex scatterers containing flat surfaces and edges.
...

References

SHOWING 1-10 OF 24 REFERENCES

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.

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

Three-dimensional broadband ground-plane cloak made of metamaterials

The first practical implementation of a fully 3D broadband and low-loss ground-plane cloak at microwave frequencies is realized, realized by drilling inhomogeneous holes in multi-layered dielectric plates.

Optical cloaking with metamaterials

This work presents the design of a non-magnetic cloak operating at optical frequencies, and the principle and structure of the proposed cylindrical cloak are analysed and the general recipe for the implementation of such a device is provided.

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.

Terahertz Frequency Sensing and Imaging: A Time of Reckoning Future Applications?

The main goal of this paper is to consider some of the most promising THz S&I applications within the specific context of their particular science and technology challenges in an attempt to credibly judge (or speculate on) their future potential.

Far-infrared time-domain spectroscopy with terahertz beams of dielectrics and semiconductors

Using the method of time-domain spectroscopy, we measure the far-infrared absorption and dispersion from 0.2 to 2 THz of the crystalline dielectrics sapphire and quartz, fused silica, and the

Metamaterial Electromagnetic Cloak at Microwave Frequencies

This work describes here the first practical realization of a cloak of invisibility, constructed with the use of artificially structured metamaterials, designed for operation over a band of microwave frequencies.

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.