Optical Nanoantennas and Their Use as Perfect Absorbers

Nanophotonics is a rapidly developing field, which aims to control light-matter interaction at the nanoscale. Nanoantennas, as a canonical element in this field, can provide a fundamental role. In this thesis, we aimed to theoretically investigate optical properties of various nanoantennas. In particular, remarkable optical features such as directional radiation pattern, Fano resonance, extreme coupling, bianisotropic response, asymmetric reflection, and complete light absorption were exploited.