Abstract
Collective plasmonic modes in two- and three-dimensional periodic assemblies ofmetallic nanoshells are studied by means of full electrodynamic calculations usingthe layer-multiple-scattering method. We consider structures made of a singletype of nanoshell as well as binary heterostructures made of two different typesof nanoshells. The complex photonic band structure of such three-dimensionalphotonic crystals is analyzed in conjunction with relevant transmission diagrams ofcorresponding finite slabs and the physical origin of the different optical modesis elucidated. Moreover, we discuss associated absorption spectra and providea consistent interpretation of the underlying physics. In the case of the binarysystems, the plasmonic modes of the two building components coexist, leading to arich structure of resonances over an extended frequency range and to broadbandabsorption.
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