We present sequential trapping and positioning of 20 nm polystyrene particles into an array configuration by using metamaterial plasmonic tweezers. The polystyrene nanoparticles suspended into a heavy water solution were trapped on adjacent plasmonic hotspots with a very low excitation power of 3.8 mW, creating a large trap stiffness of about 3.5 fN/nm. This high trapping stiffness kept the particles trapped into the nanocavities’ hotspots achieving almost 80% occupancy of the excited hotspots.
We present sequential trapping and positioning of 20 nm polystyrene particles into an array configuration by using metamaterial plasmonic tweezers. The polystyrene nanoparticles suspended into a heavy water solution were trapped on adjacent plasmonic hotspots with a very low excitation power of 3.8 mW, creating a large trap stiffness of about 3.5 fN/nm. This high trapping stiffness kept the particles trapped into the nanocavities’ hotspots achieving almost 80% occupancy of the excited hotspots.
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.
We fabricated an array of nanorings of various inner diameters on a 50 nm thick Au film. Herein, we present nanoparticle trapping using this plasmonic array and we investigate the trap stiffness as a function of the inner diameter and the intensity of the trapping laser.
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