Browsing by Subject "plasmonics"

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    Metamaterial Structural Design: Creating optical-frequency metamaterials with plasmonic nano-particle arrangements and generating unit cells with evolutionary algorithms
    (2011) Esteva, Carlos Andres; Alu, Andrea
    Metamaterials are artificial structures which can manipulate electromagnetic (EM) waves at will. These periodic lattices give engineers and researchers a large degree of control over EM radiation and can be used to create exciting and novel applications such as invisibility cloaks, superlenses, and devices with negative indices of refraction. The geometrical design of these structures is a large challenge in creating them. These structures are periodic lattices with magnetodielectric, metallic, or plasmonic inclusions. Their size, which scales on the order of the wavelength of interest, and their geometry uniquely determine the effect on EM waves as well as the frequency bands in which they operate. We present in this thesis the development of a bi-directional computational platform for metamaterial structural design. This platform serves to extract, from a given geometry, the bulk material properties of the corresponding metamaterial. It further serves to generate metamaterial unit cells which satisfy pre-determined sets of material parameters. This work is split between The University of Texas at Austin and Sandia National Laboratories