All-dielectric nanophotonics: Magnetic response, fano resonances, functional metasurfaces, and nonlinear effects

Rapid progress in the fields of plasmonics and metamaterials is driven by their ability to enhance near-field effects with subwavelength localization of light, and a majority of such effects is usually associated with metallic nanoscale structures (« meta-atoms » and « meta-molecules »). Recently, we observe the emergence of a new branch of nanophotonics aiming at the manipulation of strong optically-induced electric and magnetic Mie-type resonances in dielectric and semiconductor nanostructures with high refractive index. Unique advantages of dielectric resonant nanostructures over their metallic counterparts are low dissipative losses and the enhancement of both electric and magnetic fields that provide competitive alternatives for metal-based plasmonic structures including nanoantennas, nanoparticle sensors, and metasurfaces. In this talk, we review the new emerging field of all-dielectric nanophotonics and demonstrate that Mie-type resonances in dielectric nanoparticles and subwavelength-patterned dielectric structures can be exploited to boost performance of many photonic devices such as photodetectors, solar cells, light and thermal sources operating in the visible and near-IR spectral range.