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This paper presents a full three-dimensional carpet cloak design, whose invisibility is independent of the incident wave direction. The device is developed with transformation optics and three-dimensional quasi-conformal coordinate transformation, which is obtained through parametrization and numerical optimization. The anisotropy reduction was sufficient to consider the medium as isotropic and to...
In this paper, a two-dimensional polarization beam splitter based on transformation optics is proposed. A quasi-conformal mapping is applied resulting in a medium with inhomogeneous uniaxial permittivity and without magnetic response, which can facilitate the manufacturing process. The developed technique allows the design of arbitrary polarization splitting geometries, including asymmetrical geometries...
This paper shows the possibility to achieve 3D isotropic transformation optics via parametrization and numerical optimization. A cylindrical waveguide bend is used to test the method. A negligible anisotropy was obtained for the media which omission does not affect mode propagation.
In this paper a transformation optical design with anisotropy reduction via parametrization and Least Squares Method is applied to develop a reflectionless quasi-isotropic carpet cloak. We present a coordinate transformation function for the carpet cloak geometry that includes a variable number of degrees of freedom to minimize the anisotropy of the transformed media without interfering with the device...
In this work the least squares method is used to reduce the anisotropy in transformation optics. To apply the least squares method we added power series on the coordinate transformation functions whose coefficients were calculated to reduce the deviations in Cauchy-Riemann equations. This technique does not violate boundary conditions necessary to avoid reflections on the borders and the functionality...
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