Optimizing the optical trapping stiffness of holographically trapped microrods using high-speed video tracking

DB Phillips, DM Carberry, SH Simpson, H Schaefer, M Steinhart, R Bowman, GM Gibson, MJ Padgett, S Hanna, MJ Miles

Research output: Contribution to journalArticle (Academic Journal)

34 Citations (Scopus)

Abstract

Dielectric microrods can be trapped horizontally in pairs of holographically controlled optical traps. External forces acting on these microrods are registered via the rotational and translational displacement of the microrod relative to the traps. In the following paper we demonstrate accurate, real-time tracking of this displacement in two dimensions. The precision of the method is estimated and the translational and rotational stiffness coefficients of the trapped microrod are evaluated by analysing the thermal motion and the Stokes drag. The variation of these stiffness coefficients relative to the displacement of the traps from the ends of the microrods is measured, and optimal trapping conditions are located.
Translated title of the contributionOptimizing the optical trapping stiffness of holographically trapped microrods using high-speed video tracking
Original languageEnglish
Pages (from-to)044023
Number of pages8
JournalJournal of Optics
Volume13
DOIs
Publication statusPublished - Apr 2011

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  • Projects

    TRANSLATING THE DYNAMIC HOLOGRAPHIC ASSEMBLER

    Miles, M. J.

    1/08/091/08/13

    Project: Research

    Cite this

    Phillips, DB., Carberry, DM., Simpson, SH., Schaefer, H., Steinhart, M., Bowman, R., Gibson, GM., Padgett, MJ., Hanna, S., & Miles, MJ. (2011). Optimizing the optical trapping stiffness of holographically trapped microrods using high-speed video tracking. Journal of Optics, 13, 044023. https://doi.org/10.1088/2040-8978/13/4/044023