Dielectric Antenna Arrays and other Photonic Structures
Antennas are at the heart of modern radio and microwave frequency communications technologies. Researchers have recently extended antenna concepts to the optical frequency domain, greatly enhancing light-matter interactions in a variety of nanophotonic systems (e.g. solar cells, molecular sensors, optical tweezers). We have recently exploited the scattering resonances of high-permittivity semiconductor nanowires and nanopillars to realize all-dielectric optical antenna arrays with a variety of functionalities. These systems exhibit a series of multipole resonances with unique properties that enable novel antenna-based metamaterials, light emitters, photodetectors, and solar cells.