title: Aberration correction in holographic optical tweezers.
abstract: Holographic or diffractive optical components are widely implemented using spatial light modulators within optical tweezers to form multiple, and/or modified traps. We show that by further modifying the hologram design to account for residual aberrations, the fidelity of the focused beams can be significantly improved, quantified by a spot sharpness metric. However, the impact this improvement has on the quality of the optical trap depends upon the particle size. For particle diameters on the order of 1 microm, aberration correction can improve the trap performance metric, which is the ratio of the mean square displacement of a corrected trap to an uncorrected trap, in excess of 25%, but for larger particles the trap performance is not unduly affected by the aberrations typically encountered in commercial spatial light modulators.
authors.forename: Kurt D
authors.initials: KD
authors.lastname: Wulff
authors.forename: Daniel G
authors.initials: DG
authors.lastname: Cole
authors.forename: Robert L
authors.initials: RL
authors.lastname: Clark
authors.forename: Roberto
authors.initials: R
authors.lastname: Dileonardo
authors.forename: Jonathan
authors.initials: J
authors.lastname: Leach
authors.forename: Jon
authors.initials: J
authors.lastname: Cooper
authors.forename: Graham
authors.initials: G
authors.lastname: Gibson
authors.forename: Miles J
authors.initials: MJ
authors.lastname: Padgett