Reply to comment on "Trapping force, force constant, and potential depths for dielectric spheres in the presence of spherical aberrations"

Titelangaben

Rohrbach, Alexander ; Kress, Holger ; Stelzer, Ernst H. K.:
Reply to comment on "Trapping force, force constant, and potential depths for dielectric spheres in the presence of spherical aberrations".
In: Applied Optics. Bd. 43 (2004) Heft 9 . - S. 1827-1829.
ISSN 0003-6935
DOI: https://doi.org/10.1364/AO.43.001827

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Abstract

We acknowledge the helpful comment by Chaumet [Appl. Opt.43, 1825 (2004)] on a recent study [Appl. Opt.41, 2494 (2002)] in which we used a mathematical expression for the optical scattering and gradient forces, which had been introduced in an earlier paper [J. Opt. Soc. Am. A18, 839 (2001)]. Our reply to the comment gives us the chance to clarify interesting points and to present a novel, to our knowledge, derivation of the two force components from the basic electromagnetic force density on a small polarizable particle. Our final expression [Appl. Opt.41, 2494 (2002)] for the optical trapping force on particles in the Rayleigh-Gans regime (diameter ≤ λmedium) in a diffraction-limited, vectorial focus remains correctly published.