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Forces from highly focused laser beams: modeling, measurement and application to refractive index measurements

G. Knoener, S. Parkin, T. A. Nieminen, N. R. Heckenberg, H. Rubinsztein-Dunlop

physics.opticsarXiv:physics/0702048

Abstract

The optical forces in optical tweezers can be robustly modeled over a broad range of parameters using generalsed Lorenz-Mie theory. We describe the procedure, and show how the combination of experimental measurement of properties of the trap coupled with computational modeling, can allow unknown parameters of the particle - in this case, the refractive index - to be determined.

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