Laser Trapping of Non-Spherical Particles

Nieminen, T. A., Rubinsztein-Dunlop, H. and Heckenberg, N. R. (2000). Laser Trapping of Non-Spherical Particles. In: Videen, G., Fu, Q. and Chylek, P., Fifth Conference on Light Scattering by Nonspherical particles: theory, measurement, application. Light Scattering by Nonspherical Particles: Halifax Contributions - 5th Conference on Electromagnetic and Light Scattering by Nonspherical Particles: Theory, Measurements, and Applications, Halifax, Canada, (304-307). 28 August - 1 September.

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
halifax_laser_tr.pdf halifax_laser_tr.pdf application/pdf 65.34KB 789
Author Nieminen, T. A.
Rubinsztein-Dunlop, H.
Heckenberg, N. R.
Title of paper Laser Trapping of Non-Spherical Particles
Conference Paper Type Fully Published Paper
Conference name Light Scattering by Nonspherical Particles: Halifax Contributions - 5th Conference on Electromagnetic and Light Scattering by Nonspherical Particles: Theory, Measurements, and Applications
Conference location Halifax, Canada
Conference dates 28 August - 1 September
Proceedings title Fifth Conference on Light Scattering by Nonspherical particles: theory, measurement, application
Editor Videen, G.
Fu, Q.
Chylek, P.
Place published Maryland, US
Publisher Army Research Laboratory
Publication date 2000
Start page 304
End page 307
Collection year 2000
Language eng
Abstract/Summary Optical trapping, where microscopic particles are trapped and manipulated by light is a powerful technique. The single-beam gradient trap (also known as optical tweezers) is widely used for a large number of biological and other applications. The forces and torques acting on a trapped particle result from the transfer of momentum and angular momentum from the trapping beam to the particle. Despite the apparent simplicity of a laser trap, with a single particle in a single beam, exact calculation of the optical forces and torques acting on particles is difficult, and a number of approximations are normally made. Approximate calculations are performed either by using geometric optics, which is appropriate for large particles, or using small particle approximations. Neither approach is adequate for particles of a size comparable to the wavelength. This is a serious deficiency, since wavelength sized particles are of great practical interest because they can be readily and strongly trapped and can be used to probe interesting microscopic and macroscopic phenomena. The lack of suitable theory is even more acute when the trapping of non-spherical particles is considered. Accurate quantitative calculation of forces and torques acting on non-spherical particles is of particular interest due to the suitability of such particles as microscopic probes. These calculations are also important because of the frequent occurrence of non-spherical biological and other structures, and the possibility of rotating or controlling the orientation of such objects. The application of electromagnetic scattering theory to the laser-trapping of wavelength sized non-spherical particles is presented.
Subjects 240400 Optical Physics
240000 Physical Sciences
240402 Quantum Optics and Lasers
Keyword optical tweezers
laser trapping
micromanipulation
References [1] A. Ashkin, "The pressure of laser light," Scientific American 226, 63-71 (1972). [2] K. Svoboda and S. M. Block, "Biological applications of optical forces," Annual Review of Biophysical and Biomolecular Structure 23, 247-285 (1994). [3] D. G. Grier, "Optical tweezers in colloid and interface science," Current Opinion in Colloid and Interface Science 2, 264-270 (1997). [4] Z.-P. Luo, Y.-L. Sun, and K.-N. An, "An optical spin micromotor," Applied Physics Letters 76, 1779-1781 (2000). [5] K. F. Ren, G. Grehan, and G. Gouesbet, "Prediction of reverse radiation pressure by generalized Lorenz-Mie theory," Applied Optics 38, 4861-4869 (1996). [6] T. Wohland, A Rosin, and E. H. K. Stelzer, "Theoretical determination of the influence of polarization on forces exerted by optical tweezers," Optik 102, 181-190 (1996). [7] O. Farsund and B. U. Felderhof, "Force, torque, and absorbed energy for a body of arbitrary shape and constitution in an electromagnetic radiation field," Physica A 227, 108-130 (1996). [8] A. Doicu and T.Wriedt, "Plane wave spectrum of electromagnetic beams," 136, 114-124 (1997). [9] D. A. White, "Numerical modeling of optical gradient traps using the vector finite element method," Journal of Computational Physics 159, 13-37 (2000). [10] J. P. Barton and D. R. Alexander, "Fifth-order corrected electromagnetic field components for a fundamental Gaussian beam," Journal of Applied Physics 66, 2800-2802 (1989).
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Conference Paper
Sub-type: Fully Published Paper
Collection: School of Physical Sciences Publications
 
Versions
Version Filter Type
Citation counts: Google Scholar Search Google Scholar
Access Statistics: 463 Abstract Views, 789 File Downloads  -  Detailed Statistics
Created: Wed, 19 May 2004, 10:00:00 EST by Timo Nieminen on behalf of School of Mathematics & Physics