This consistent & systematic review of recent advances in optical antenna theory & practice brings together leading experts in the fields of electrical engineering nano-optics & nano-photonics physical chemistry & nanofabrication. Fundamental concepts & functionalities relevant to optical antennas are explained together with key principles for optical antenna modelling design & characterisation. Recognising the tremendous potential of this technology practical applications are also outlined. Presenting a clear translation of the concepts of radio antenna design near-field optics & field-enhanced spectroscopy into optical antennas this interdisciplinary book is an indispensable resource for researchers & graduate students in engineering optics & photonics physics & chemistry.