Observation of bistability of trapping position in aerosol optical tweezers

Kerry J. Knox, Daniel R. Burnham, Lowell I. McCann, Shawntel L. Murphy, David McGloin, Jonathan P. Reid

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    Bistability in the axial trapping position of aqueous aerosol droplets has been observed for the first time, to our knowledge, in optical tweezers. The behavior has been observed for two distinct trapping configurations, with the trapping beam oriented either along the vertical or horizontal axis. This represents the first report of the optical tweezing of aerosol droplets with a horizontally propagating laser beam. Side imaging was used in conjunction with imaging in the plane of the optical trap. Droplet sizing was performed using cavity-enhanced Raman spectroscopy or by applying a circular regression routine to the acquired images. Predictions from a theoretical model of optical forces are shown to be in good agreement with the experimental observations of bistability in the trapping position. These studies have significance both for the rigorous interpretation of data obtained using aerosol optical tweezers and for the modeling of aerosol optical traps. (C) 2010 Optical Society of America

    Original languageEnglish
    Pages (from-to)582-591
    Number of pages10
    JournalJournal of the Optical Society of America B - Optical Physics
    Volume27
    Issue number3
    DOIs
    Publication statusPublished - Mar 2010

    Keywords

    • DIELECTRIC PARTICLES
    • RADIATION PRESSURE
    • WATER DROPLET
    • FORCE
    • MANIPULATION
    • FIELD
    • SIZE
    • AIR

    Cite this

    Knox, Kerry J. ; Burnham, Daniel R. ; McCann, Lowell I. ; Murphy, Shawntel L. ; McGloin, David ; Reid, Jonathan P. / Observation of bistability of trapping position in aerosol optical tweezers. In: Journal of the Optical Society of America B - Optical Physics. 2010 ; Vol. 27, No. 3. pp. 582-591.
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    title = "Observation of bistability of trapping position in aerosol optical tweezers",
    abstract = "Bistability in the axial trapping position of aqueous aerosol droplets has been observed for the first time, to our knowledge, in optical tweezers. The behavior has been observed for two distinct trapping configurations, with the trapping beam oriented either along the vertical or horizontal axis. This represents the first report of the optical tweezing of aerosol droplets with a horizontally propagating laser beam. Side imaging was used in conjunction with imaging in the plane of the optical trap. Droplet sizing was performed using cavity-enhanced Raman spectroscopy or by applying a circular regression routine to the acquired images. Predictions from a theoretical model of optical forces are shown to be in good agreement with the experimental observations of bistability in the trapping position. These studies have significance both for the rigorous interpretation of data obtained using aerosol optical tweezers and for the modeling of aerosol optical traps. (C) 2010 Optical Society of America",
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    author = "Knox, {Kerry J.} and Burnham, {Daniel R.} and McCann, {Lowell I.} and Murphy, {Shawntel L.} and David McGloin and Reid, {Jonathan P.}",
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    Observation of bistability of trapping position in aerosol optical tweezers. / Knox, Kerry J.; Burnham, Daniel R.; McCann, Lowell I.; Murphy, Shawntel L.; McGloin, David; Reid, Jonathan P.

    In: Journal of the Optical Society of America B - Optical Physics, Vol. 27, No. 3, 03.2010, p. 582-591.

    Research output: Contribution to journalArticle

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    AU - McGloin, David

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    KW - WATER DROPLET

    KW - FORCE

    KW - MANIPULATION

    KW - FIELD

    KW - SIZE

    KW - AIR

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