Design and Experimental Implementation of a Multi-Cloak Paraxial Optical System
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TLDR
This work developed the mathematical formalism and showed the successful operation of the cloaking system with the naked eye, by proposing a five-lens system producing at least three potential invisible regions with a large cloaked area.Abstract:
Electromagnetic cloaking has being continuously pursued using a large variety of approaches. In recent years, this effect has been observed using either complex devices based on the so-called Transformation Optics or simple systems based on conventional optics with proper characteristics. In the latter case, a simple arrangement of lenses working in the paraxial regime can provide broadband visible cloaking in a wide area. In this work, we analyzed and generalized this method by proposing a five-lens system producing at least three potential invisible regions with a large cloaked area (>90% of the visual field). In particular, we developed the mathematical formalism and show, both numerically and experimentally, the successful operation of the cloaking system with the naked eye.read more
Citations
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Journal ArticleDOI
Paraxial ray optics cloaking
Joseph S. Choi,John C. Howell +1 more
TL;DR: In this article, a three-dimensional, transmitting, continuously multidirectional cloaking in the visible regime has been demonstrated using ray optics, albeit with some edge effects, and a concise formalism that quantifies and produces perfect optical cloaks in the small-angle (paraxial) limit is provided.
Journal Article
Paraxial Full-Field Cloaking
Joseph S. Choi,John C. Howell +1 more
TL;DR: Choi and Howell as discussed by the authors showed that an isotropic plate of uniform thickness, with appropriately designed refractive index and dispersion, can match the phase over the whole visible spectrum.
References
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Controlling Electromagnetic Fields
TL;DR: This work shows how electromagnetic fields can be redirected at will and proposes a design strategy that has relevance to exotic lens design and to the cloaking of objects from electromagnetic fields.
Journal ArticleDOI
Metamaterial Electromagnetic Cloak at Microwave Frequencies
David Schurig,Jack J. Mock,B.J. Justice,Steven A. Cummer,John B. Pendry,Anthony F. Starr,David R. Smith +6 more
TL;DR: 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.
Journal ArticleDOI
Transformation optics and metamaterials
TL;DR: The potential of transformation optics to create functionalities in which the optical properties can be designed almost at will is reviewed, which can be used to engineer various optical illusion effects, such as the invisibility cloak.
Journal ArticleDOI
General relativity in electrical engineering
Ulf Leonhardt,Thomas G. Philbin +1 more
TL;DR: In this article, the authors show that general relativity provides the theoretical tools for designing devices made of metamaterials, such as perfect invisibility devices, perfect lenses, the optical Aharonov-Bohm effect and electromagnetic analogues of the event horizon.
Journal ArticleDOI
Macroscopic invisibility cloaking of visible light
TL;DR: 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.