Electromagnetic beam modulating through transformation optical structures

Abstract

The transformation media concept based on the form-invariant Maxwell's equations under coordinate transformations has opened up new possibilities to manipulate the electromagnetic fields. In this paper we report on applying the finite-embedded coordinate transformation method to design electromagnetic beam modulating devices both in the Cartesian coordinates and in the cylindrical coordinates. By designing the material constitutive tensors of the transformation optical structures through different kinds of coordinate transformations, either the beam width of an incident Gaussian plane wave could be modulated by a slab, or the wave propagating direction of an omni-directional source could be modulated through a cylindrical shell. We present the design procedures and the full wave electromagnetic simulations that clearly confirm the performance of the proposed beam modulating devices.

15 pages, 8 figures

References in corpus (8)

• Optical Hyperlens: Far-field imaging beyond the diffraction limit
• Full-wave simulations of electromagnetic cloaking structures
• Magnifying superlens in the visible frequency range
• Transformation media that rotate electromagnetic fields
• Optical design of reflectionless complex media by finite embedded coordinate transformations
• Confirmation of Cylindrical Perfect Invisibility Cloak Using Fourier-Bessel Analysis
• Electromagnetic cloaking by layered structure of homogeneous isotropic materials
• Notes on Conformal Invisibility Devices