Open AccessConformal mappings to achieve simple material parameters for transformation optics devices
Author(s) -
Jeremiah P. Turpin,
Ayah T. Massoud,
Zhi Hao Jiang,
Pingjuan L. Werner,
Douglas H. Werner
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.000244
Subject(s) - transformation optics , metamaterial , optics , lens (geology) , conformal map , transformation (genetics) , planar , computer science , geometrical optics , plane wave , plane (geometry) , physics , mathematics , biochemistry , chemistry , computer graphics (images) , geometry , gene , mathematical analysis
The transformation optics technique for designing novel electromagnetic and optical devices offers great control over wave behavior, but is difficult to implement primarily due to limitations in current metamaterial design and fabrication techniques. This paper demonstrates that restricting the spatial transformation to a conformal mapping can lead to much simpler material parameters for more practical implementation. As an example, a flat cylindrical-to-plane-wave conversion lens is presented and its performance validated through numerical simulations. It is shown that the lens dimensions and embedded source location can be adjusted to produce one, two, or four highly directive planar beams. Two metamaterial designs for this lens that implement the required effective medium parameters are proposed and their behavior analyzed.