Open AccessFull three-dimensional isotropic carpet cloak designed by quasi-conformal transformation optics
Author(s) -
Daniely G. Silva,
Poliane A. Teixeira,
Lucas H. Gabrielli,
Mateus A. F. C. Junqueira,
Danilo H. Spadoti
Publication year - 2017
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.023517
Subject(s) - cloak , transformation optics , optics , conformal map , isotropy , coordinate system , physics , geometrical optics , polarization (electrochemistry) , transformation (genetics) , invisibility , physical optics , anisotropy , metamaterial , computer science , geometry , mathematics , biochemistry , chemistry , gene , artificial intelligence
A fully three-dimensional carpet cloak presenting invisibility in all viewing angles is theoretically demonstrated. The design is developed using transformation optics and three-dimensional quasi-conformal mapping. Parametrization strategy and numerical optimization of the coordinate transformation deploying a quasi-Newton method is applied. A discussion about the minimum achievable anisotropy in the 3D transformation optics is presented. The method allows to reduce the anisotropy in the cloak and an isotropic medium could be considered. Numerical simulations confirm the strategy employed enabling the design of an isotropic reflectionless broadband carpet cloak independently of the incident light direction and polarization.