Metamaterial tweezers for super-efficient nanoparticle trapping

Metamaterial tweezers for trapping of polystyrene particles with 20nm diameter are presented. Proper fabrication of nanostructures on a gold thin film lead to the metamaterials that exhibit Fano interference and are being used for trapping of nanoparticles. The use of metamaterial tweezers significantly enhanced the trapping conditions and demonstrate a trapping stiffness much higher than previously reported in various cases of plasmonic tweezers.