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Applied Optics

Applied Optics


  • Vol. 43, Iss. 9 — Mar. 19, 2004
  • pp: 1825–1826

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

Patrick C. Chaumet  »View Author Affiliations

Applied Optics, Vol. 43, Issue 9, pp. 1825-1826 (2004)

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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

OCIS Codes
(180.0180) Microscopy : Microscopy
(260.0260) Physical optics : Physical optics
(290.0290) Scattering : Scattering

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)

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  1. A. Rohrbach, E. H. K. Stelzer, “Trapping force, force constant, and potential depths for dielectric spheres in the presence of spherical aberrations,” Appl. Opt. 41, 2494–2507 (2002). [CrossRef] [PubMed]
  2. A. Rohrbach, E. H. K. Stelzer, “Optical trapping of dielectric particles in arbitrary fields,” J. Opt. Soc. Am. A 18, 839–853 (2001). [CrossRef]
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  8. One can find Eq. (5) by taking the transverse imaginary part of the free-space Green function, Im[GT(r, r)] = (2/3)k3, as described in S. M. Barnett, B. Huttner, R. Loudon, R. Matloob, “Decay of excited atoms in absorbing dielectrics,” J. Phys. B 29, 3763–3781 (1996).
  9. B. T. Draine, “The discrete dipole approximation and its application to interstellar graphite grains,” Astrophys. J. 333, 848–872 (1988). [CrossRef]
  10. P. C. Chaumet, M. Nieto-Vesperinas, “Time-averaged total force on a dipolar sphere in an electromagnetic field,” Opt. Lett. 25, 1065–1067 (2000). [CrossRef]
  11. P. C. Chaumet, M. Nieto-Vesperinas, “Coupled dipole method determination of the electromagnetic force on a particle over a flat dielectric substrate,” Phys. Rev. B 61, 14,119–14,127 (2000). [CrossRef]

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