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The recently developed concept of two dimensional metamaterial — the metasurface, provides more convenient method to manipulate electromagnetic wave in a designable way within subwavelength distance. However, most of the metasurface designs rely on the meta-atom's properties to achieve certain EM wave control. In this presentation, we propose the top-down design method of metasurface through the surface...
Dynamic control of electromagnetic (EM) wave propagation (both the amplitude and phase) is essential to many practical applications. The recently developed two dimensional metamaterial — the metasurface, provides more convenient method to manipulate EM wave in a designable way within subwavelength distance. Here we incorporate electrical tunable elements into the metasurface designs to realize dynamic...
This paper presents a novel thin transparent metasurface design which is employed for compensating the out-of-phase radiation from a conventional microstrip patch antenna. Such metasurface mounted on a patch antenna has the ability to transform a primary radiation with spherical-like phase profile into an in-phase planar one. Radiation pattern of the primary source is squeezed into a narrow beam with...
The control of electromagnetic wave propagation is an important issue in either fundamental electromagnetic research or device application technologies. In this presentation we incorporate the active element into the metasurface concept to achieve dynamic control of electromagnetic wave reflection. We will present the application of active metasurfaces to the control of the polarization and phase...
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