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Photorealistic ray tracing of free-space invisibility cloaks made of uniaxial dielectrics

Halimeh, J. C.; Wegener, M.

The design rules of transformation optics generally lead to spatially inhomogeneous and anisotropic impedance-matched magnetodielectric material distributions for, e.g., free-space invisibility cloaks. Recently, simplified anisotropic non-magnetic free-space cloaks made of a locally uniaxial dielectric material (calcite) have been realized experimentally. In a two-dimensional setting and for in-plane polarized light propagating in this plane, the cloaking performance can still be perfect for light rays. However, for general views in three dimensions, various imperfections are expected. In this paper, we study two different purely dielectric uniaxial cylindrical free-space cloaks. For one, the optic axis is along the radial direction, for the other one it is along the azimuthal direction. The azimuthal uniaxial cloak has not been suggested previously to the best of our knowledge. We visualize the cloaking performance of both by calculating photorealistic images rendered by ray tracing. Following and complementing our previous ray-tracing work, we use an equation of motion directly derived from Fermat’s principle. The rendered images generally exhibit significant imperfections. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000035154
Veröffentlicht am 28.05.2018
DOI: 10.1364/OE.20.028330
Zitationen: 9
Web of Science
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Physik (APH)
Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2012
Sprache Englisch
Identifikator ISSN: 1094-4087
KITopen-ID: 1000035154
HGF-Programm 43.14.01 (POF II, LK 01)
Photonics crystals and metamaterials
Erschienen in Optics express
Band 20
Heft 27
Seiten 28330-28340
Nachgewiesen in Web of Science
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