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Université de Neuchâtel

Calculation of the torque on dielectric elliptical cylinders

Rockstuhl, Carsten ; Herzig, Hans-Peter

In: Journal of the Optical Society of America A, 2005, vol. 22, no. 1, p. 109-116

We present our investigation of the torque exerted on dielectric elliptical cylinders by highly focused laser beams. The calculations are performed with rigorous diffraction theory, and the size-dependent torque is analyzed as a function of the axis ratio. It is found that highly elongated particles will experience a reversal of the torque for a radius that is approximately one third of the...