KIT | KIT-Bibliothek | Impressum
Open Access Logo

Newtonian photorealistic ray tracing of grating cloaks and correlation-function-based cloaking-quality assessment

Halimeh, J.C.; Schmied, R.; Wegener, M.

Grating cloaks are a variation of dielectric carpet (or ground-plane) cloaks. The latter were introduced by Li and Pendry. In contrast to the numerical work involved in the quasi-conformal carpet cloak, the refractive-index profile of a conformal grating cloak follows a closed and exact analytical form. We have previously mentioned that finite-size conformal grating cloaks may exhibit better cloaking than usual finite-size carpet cloaks. In this paper, we directly visualize their performance using photorealistic ray-tracing simulations. We employ a Newtonian approach that is advantageous compared to conventional ray tracing based on Snell's law. Furthermore, we quantify the achieved cloaking quality by computing the cross-correlations of rendered images. The cross-correlations for the grating cloak are much closer to 100% (i.e., ideal) than those for the Gaussian carpet cloak.

Zugehörige Institution(en) am KIT Institut für Angewandte Physik (APH)
Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2011
Sprache Englisch
Identifikator ISSN: 1094-4087
KITopen ID: 1000027167
HGF-Programm 43.14.01; LK 01
Erschienen in Optics Express
Band 19
Heft 7
Seiten 6078 - 6092
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft KITopen Landing Page