Lattice Kerker Effect Goes Plasmonic

Mostly forsaken, but revived after the emergence of all-dielectric nanophotonics, the Kerker effect can be observed in a variety of nanostructures from high-index constituents with strong electric and magnetic Mie resonances. Necessary requirement for the existence of a magnetic response prohibits the use of generally non-magnetic conventional plasmonic nanostructures for the Kerker effect. In spite of this, we demonstrate here for the first time the emergence of the lattice Kerker effect in regular plasmonic Al nanostructures. The suppression of the backscattering originates from a delicate interplay between localized surface plasmon resonances and collective lattice oscillations of electric and magnetic dipole, and electric and magnetic quadrupole nature. Variation of geometrical parameters of Al arrays allows for tailoring lattice Kerker effect throughout UV and visible wavelength ranges, which is hard to achieve on using other plasmonics or all-dielectric materials. It is argued that our results set the ground for wide ramifications in the plasmonics and further utilization of the Kerker effect.