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
Original Manuscript: April 7, 2003
Revised Manuscript: June 9, 2003
Published: March 20, 2004
Patrick C. Chaumet, "Comment on “Trapping force, force constant, and potential depths for dielectric spheres in the presence of spherical aberrations”," Appl. Opt. 43, 1825-1826 (2004)