Nanoparticle positioning via metamaterial plasmonic tweezers

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.

Duke Scholars

Author Domna Kotsifaki DKU Faculty