title: All-dielectric optical nanoantennas.
abstract: We study in detail a novel type of optical nanoantennas made of high-permittivity low-loss dielectric particles. In addition to the electric resonances, the dielectric particles exhibit very strong magnetic resonances at the nanoscale, that can be employed in the Yagi-Uda geometry for creating highly efficient optical nanoantennas. By comparing plasmonic and dielectric nanoantennas, we demonstrate that all-dielectric nanoantennas may exhibit better radiation efficiency also allowing more compact design.
authors.affiliation: National Research University of Information Technologies, Mechanics and Optics, St. Petersburg 197101, Russia. krasnokfiz@mail.ru
authors.forename: Alexander E
authors.initials: AE
authors.lastname: Krasnok
authors.forename: Andrey E
authors.initials: AE
authors.lastname: Miroshnichenko
authors.forename: Pavel A
authors.initials: PA
authors.lastname: Belov
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Kivshar
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D014159:Transducers