Computational modeling of optical tweezers

Nieminen, Timo A., Heckenberg, Norman R. and Rubinsztein-Dunlop, Halina (2004). Computational modeling of optical tweezers. In: Kishan Dholakia and Gabriel C. Spalding, Proceedings of SPIE. Optical Trapping and Optical Micromanipulation, Denver, CO, USA, (514-523). 2-6 August 2004. doi:10.1117/12.557090

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Author Nieminen, Timo A.
Heckenberg, Norman R.
Rubinsztein-Dunlop, Halina
Title of paper Computational modeling of optical tweezers
Conference name Optical Trapping and Optical Micromanipulation
Conference location Denver, CO, USA
Conference dates 2-6 August 2004
Proceedings title Proceedings of SPIE   Check publisher's open access policy
Journal name Optical Trapping and Optical Micromanipulation   Check publisher's open access policy
Place of Publication Bellingham, Washington, U.S.A.
Publisher SPIE - International Society for Optical Engineering
Publication Year 2004
Sub-type Fully published paper
DOI 10.1117/12.557090
Open Access Status File (Publisher version)
ISBN 0-8194-5452-4
ISSN 0277-786X
1996-756X
Editor Kishan Dholakia
Gabriel C. Spalding
Volume 5514
Start page 514
End page 523
Total pages 10
Language eng
Abstract/Summary Computational modelling of optical tweezers offers opportunities for the study of a wide range of parameters such as particle shape and composition and beam profile on the performance of the optical trap, both of which are of particular importance when applying this technique to arbitrarily shaped biological entities. In addition, models offer insight into processes that can be difficult to experimentally measure with sufficient accuracy. This can be invaluable for the proper understanding of novel effects within optical tweezers. In general, we can separate methods for computational modelling of optical tweezers into two groups: approximate methods such as geometric optics or Rayleigh scattering, and exact methods, in which the Maxwell equations are solved. We discuss the regimes of applicability of approximate methods, and consider the relative merits of various exact methods. The T-matrix method, in particular, is an attractive technique due to its efficiency for repeated calculations, and the simplicity of determining the optical force and torque. Some example numerical results are presented.
Subjects 240504 Electrostatics and Electrodynamics
240400 Optical Physics
E1
780102 Physical sciences
240499 Optical Physics not elsewhere classified
Keyword optical tweezers
T-matrix
scattering
Q-Index Code E1

 
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Created: Wed, 10 Nov 2004, 10:00:00 EST by Timo Nieminen on behalf of School of Mathematics & Physics