Number of the records: 1  

Direct measurement of the nonconservative force field generated by optical tweezers

  1. 1.
    0333705 - ÚPT 2010 RIV US eng J - Journal Article
    Wu, P. - Huang, R. - Tischer, Ch. - Jonáš, Alexandr - Florin, E. L.
    Direct measurement of the nonconservative force field generated by optical tweezers.
    Physical Review Letters. Roč. 103, č. 10 (2009), 108101:1-4. ISSN 0031-9007
    Institutional research plan: CEZ:AV0Z20650511
    Keywords : manipulation * molecules * particles * equality * trap
    Subject RIV: BH - Optics, Masers, Lasers
    Impact factor: 7.328, year: 2009

    The force field of optical tweezers is commonly assumed to be conservative, neglecting the complex action of the scattering force. Using a novel method that extracts local forces from trajectories of an optically trapped particle, we measure the three-dimensional force field experienced by a Rayleigh particle with 10 nm spatial resolution and femtonewton precision in force. We find that the force field is nonconservative with the nonconservative component increasing radially away from the optical axis, in agreement with the Gaussian beam model of the optical trap.
    Permanent Link: http://hdl.handle.net/11104/0178634
     
Number of the records: 1