![]() Finally, in a structure composed of Silicon nano-rods, an ultra-wideband and wide-angle highly-efficient beam deflection is obtained. ![]() Moreover, using the combination of the MIM cavity and an electro-optic material, we have shown that a lithography-free color filter can be achieved that covers the whole visible spectrum by changing the voltage from -12 to 12 volts. For instance, in the work based on random nanopyramids, we obtain ultraviolet (UV) to far-infrared (FIR) perfect absorption by exploiting a lithography-free method and only by coating a single Mn layer on a high-roughness substrate. It is shown in all works that Mn has a much better performance compared to other metals. Mn is used in the Metal-Insulator-Metal (MIM) cavity, annealed MIM configuration, top-layer-patterned MIM configuration, and random nanopyra-mids. Four different Mn-based broadband absorbers are designed and fabricated in different chapters. We have introduced Manganese (Mn) for the first time as a very promising metal for broadband absorption and have used it in all our works. By lithogra-phy being a major hinder on the way to mass production and cost-effectiveness, most of our works are lithography-free. Wideband and wide-angle efficient beam deflector and Multi-functional angular filter. Here we design and implement three important applications of metamaterials as: 1. Metamaterials have enabled us to come up with artificial structures and designs that can perform optical functionalities which are not achievable with natural materials. ![]()
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