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Comment on “Trapping force, force constant, and potential depths for dielectric spheres in the presence of spherical aberrations”

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Abstract

I point out a confusion that is rather common in optical forces, i.e., that the time average of the Lorentz force on a dipole (for a harmonic time-varying field) is sometimes assumed to be a gradient force that is due to omission of the radiative reaction term in the polarizability of the dipole.

© 2004 Optical Society of America

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