title: Nano-optical conveyor belt, part I: Theory.
abstract: We propose a method for peristaltic transport of nanoparticles using the optical force field over a nanostructured surface. Nanostructures may be designed to produce strong near-field hot spots when illuminated. The hot spots function as optical traps, separately addressable by their resonant wavelengths and polarizations. By activating closely packed traps sequentially, nanoparticles may be handed off between adjacent traps in a peristaltic fashion. A linear repeating structure of three separately addressable traps forms a "nano-optical conveyor belt"; a unit cell with four separately addressable traps permits controlled peristaltic transport in the plane. Using specifically designed activation sequences allows particle sorting.
authors.affiliation: Department of Applied Physics and ‡Department of Electrical Engineering, Stanford University , Stanford, California 94305, United States.
authors.forename: Paul
authors.initials: P
authors.lastname: Hansen
authors.forename: Yuxin
authors.initials: Y
authors.lastname: Zheng
authors.forename: Jason
authors.initials: J
authors.lastname: Ryan
authors.forename: Lambertus
authors.initials: L
authors.lastname: Hesselink