title: Precision optical trapping via a programmable direct-digital-synthesis-based controller for acousto-optic deflectors.
abstract: We describe a simple-to-construct programmable direct-digital-synthesis-based controller for use with acousto-optic deflectors. Our controller corrects for nonlinear diffraction efficiency versus diffraction angle, provides superior stability, functionality, and configurability, and costs a fraction of commercially available systems. Using this instrument, we move a 1 mum diameter bead by 1-nm-sized steps and resolve these steps.
authors.affiliation: Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA.
authors.forename: A H
authors.initials: AH
authors.lastname: Mack
authors.forename: M K
authors.initials: MK
authors.lastname: Trías
authors.forename: S G J
authors.initials: SG
authors.lastname: Mochrie