Authors: Tie Jun Cui and Wei Xiang Jiang
Source: FERMAT, Volume 11, Communications 10, Sep_Oct, 2015
Abstract: The rapid development of artificial metamaterials have provided many opportunities for new device design, but brought the need for tools that can provide us an efficient design for a special functionality. In 2006, Pendry et al. proposed the technique of transformation optics (TO), which fulfilled the requirement for such a tool. For TO devices, the composite material implements a coordinate transformation for EM fields, and the electric permittivity and magnetic permeability of the material could be derived from the methodology of TO. Transformation electromagnetic or transformation optics provides a freedom way to control the electric currents and potentials. Transformation optics/electromagnetics has been used to design and create a lot of novel devices theoretically and numerically. We have designed and fabricated a series of transformation devices, such as kinds of carpet cloaks, flattened Luneburg lens and illusion devices, etc. The measurement results agree exceptionally well with theoretical predictions and simulation results, showing perfect performance. Manipulation of electromagnetic fields with the control of anisotropic conductivities has a lot of potential applications, such as high-efficient wireless communications, camouflage and military hiding.
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