Over the last few years, artificially structured media, referred to as metamaterials, have attracted much attention due to their extraordinary electromagnetic responses not found in naturally occurring materials. This book in particular focuses on studying and harnessing the possibilities opened up by two emerging classes of metamaterials: plasmonic materials and dispersion-engineered materials. The former has the capability to confine optical fields at nanoscales beyond the diffraction limit, while the latter has the capability to dramatically slow down electromagnetic wave ...