Optical traps with geometric aberrations

Yael Roichman, Alex Waldron, Emily Gardel, David G. Grier

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We assess the influence of geometric aberrations on the in-plane performance of optical traps by studying the dynamics of trapped colloidal spheres in deliberately distorted holographic optical tweezers. The lateral stiffness of the traps turns out to be insensitive to moderate amounts of coma, astigmatism, and spherical aberration. Moreover holographic aberration correction enables us to compensate inherent shortcomings in the optical train, thereby adaptively improving its performance. We also demonstrate the effects of geometric aberrations on the intensity profiles of optical vortices, whose readily measured deformations suggest a method for rapidly estimating and correcting geometric aberrations in holographic trapping systems.

    Original languageEnglish (US)
    Pages (from-to)3425-3429
    Number of pages5
    JournalApplied Optics
    Volume45
    Issue number15
    DOIs
    StatePublished - May 20 2006

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics
    • Engineering (miscellaneous)
    • Electrical and Electronic Engineering

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