Numerical analysis of an optical motor based on the radiation pressure

Yoshiro Ohmachi; Kazuhiro Baba; Eiji Higurashi

doi:10.1117/12.250719

17 September 1996 Numerical analysis of an optical motor based on the radiation pressure

Yoshiro Ohmachi, Kazuhiro Baba, Eiji Higurashi

Proceedings Volume 2882, Micromachined Devices and Components II; (1996) https://doi.org/10.1117/12.250719
Event: Micromachining and Microfabrication '96, 1996, Austin, TX, United States

Abstract

The radiation force exerted on a transparent disk-type optical rotator with shape dissymmetry is predicted using a x-ray optics model. We performed a quantitative analysis of the torque exerted on the rotator while ion a single-beam gradient-force optical trap. Rotation is due to the optical torque from the laser radiation pressure on the side walls. Thus, the maximum torque is obtained when a large proportion of the laser beam is incident to the side walls. Both the trapping force and the torque depend proportion of the laser beam is incident to the side walls. Both the trapping force and the torque depend strongly on the position of the rotator and the numerical aperture. We also found that there is an optimum value of NA at which the maximum torque is generated. The validity of the ray-optics model for polystyrene latex spheres in the trap was also confirmed by our experimental results. From the experimental rotation speed of the polymide rotator and the numerical results, we quantified the damping factor and the static frictional torque of the rotator.

Citation Download Citation

Yoshiro Ohmachi, Kazuhiro Baba, and Eiji Higurashi "Numerical analysis of an optical motor based on the radiation pressure", Proc. SPIE 2882, Micromachined Devices and Components II, (17 September 1996); https://doi.org/10.1117/12.250719

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