Abstract

The first evidence of particle confinement using plasmonics was demonstrated by Garcés-Chávez in 2006. They used the Kretschmann configuration with the top surface of a prism coated by a thin gold layer in order to observe large scale ordering of colloidal particles.¹ Later Righini et al. modified the experimental apparatus by fabricating golden micro-disks, instead of using a thin gold layer, leading to the successful trapping of polystyrene spheres on top of these microstructures.² In 2011, Gordon and Pang achieved 12 nm particle confinement. Their devices consisted of double nano-holes which were connected by a slit punched on a thin gold film.³

© 2015 Japan Society of Applied Physics, Optical Society of America