title: Axial force acting on a dielectric sphere in a focused laser beam.
abstract: We present the detailed behavior of the axial force acting on a dielectric sphere exerted by the optical pressure of a focused Gaussian laser beam. Comparison is made between the numerical results and those calculated from the radiation pressure cross section. There is also a discussion as to whether the expressions for the axial force given in this paper are consistent with the previously reported experimental results. Moreover, a simple experimental method to measure the axial force on a polystyrene sphere suspended in water is demonstrated, and fairly good agreement between theoretical and experimental results was obtained.
authors.forename: S
authors.initials: S
authors.lastname: Nemoto
authors.forename: H
authors.initials: H
authors.lastname: Togo