Abstract

In this comment, problems associated with an oversimplified FDTD based model used for trapping force calculation in recent papers “Computation of the optical trapping force using an FDTD based technique” [Opt. Express 13, 3707 (2005)], and “Rigorous time domain simulation of momentum transfer between light and microscopic particles in optical trapping” [Opt. Express 12, 2220 (2004)] are discussed. A more rigorous model using in Poynting vector is also presented.

© 2006 Optical Society of America

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References

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  1. R. C. Gauthier, "Computation of the optical trapping force using an FDTD based technique," Opt. Express 13,3707-3718 (2005). http://www.opticsexpress.org/abstract.cfm?URI=OPEX-13-10-3707
    [CrossRef] [PubMed]
  2. D. Zhang, X.-C. Yuan, S. C. Tjin, and S. Krishnan, "Rigorous time domain simulation of momentum transfer between light and microscopic particles in optical trapping," Opt. Express 12,2220-2230 (2004). http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-10-2220
    [CrossRef] [PubMed]
  3. A. Ashkin, "Forces of a single-beam gradient laser trap on a dielectric sphere in the ray optics regime," Biophys. J. 61, 569-582 (1992).
    [CrossRef] [PubMed]
  4. W. L. Collett, C. A. Ventrice and S. M. Mahajan, "Electromagnetic wave technique to determine radiation torque on micromachines driven by light," Appl. Phys. Lett. 82, 2730-2732 (2003).
    [CrossRef]
  5. A. R. Zakharian, M. Mansuripur, and J. V. Moloney, "Radiation pressure and the distribution of electromagnetic force in dielectric media," Opt. Express 13, 2321-2336 (2005). http://www.opticsexpress.org/abstract.cfm?URI=OPEX-13-7-2321
    [CrossRef] [PubMed]
  6. J. D. Jackson, Classical Electrodynamics (Wiley, New York, 1962).

2005 (2)

2004 (1)

2003 (1)

W. L. Collett, C. A. Ventrice and S. M. Mahajan, "Electromagnetic wave technique to determine radiation torque on micromachines driven by light," Appl. Phys. Lett. 82, 2730-2732 (2003).
[CrossRef]

1992 (1)

A. Ashkin, "Forces of a single-beam gradient laser trap on a dielectric sphere in the ray optics regime," Biophys. J. 61, 569-582 (1992).
[CrossRef] [PubMed]

Ashkin, A.

A. Ashkin, "Forces of a single-beam gradient laser trap on a dielectric sphere in the ray optics regime," Biophys. J. 61, 569-582 (1992).
[CrossRef] [PubMed]

Collett, W. L.

W. L. Collett, C. A. Ventrice and S. M. Mahajan, "Electromagnetic wave technique to determine radiation torque on micromachines driven by light," Appl. Phys. Lett. 82, 2730-2732 (2003).
[CrossRef]

Gauthier, R. C.

Krishnan, S.

Mahajan, S. M.

W. L. Collett, C. A. Ventrice and S. M. Mahajan, "Electromagnetic wave technique to determine radiation torque on micromachines driven by light," Appl. Phys. Lett. 82, 2730-2732 (2003).
[CrossRef]

Mansuripur, M.

Moloney, J. V.

Tjin, S. C.

Ventrice, C. A.

W. L. Collett, C. A. Ventrice and S. M. Mahajan, "Electromagnetic wave technique to determine radiation torque on micromachines driven by light," Appl. Phys. Lett. 82, 2730-2732 (2003).
[CrossRef]

Yuan, X.-C.

Zakharian, A. R.

Zhang, D.

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Equations (7)

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d p = ( S · σ ) d t d a ћ ω ћ k k k ,
= n c k k ( S · σ ) d t d a
< F > = < d P d t > = < n c k k ( S · σ ) d a > ,
d P d a = ( n c ) S
F = n c Δ S · d A
F x = Δ S x c L , Δ S x = S x o S x
F y = Δ S y c L , Δ S y = S y o S y

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