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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 4 — Feb. 21, 2005
  • pp: 1260–1265

Optical trapping force with annular and doughnut laser beams based on vectorial diffraction

Djenan Ganic, Xiaosong Gan, and Min Gu  »View Author Affiliations

Optics Express, Vol. 13, Issue 4, pp. 1260-1265 (2005)

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The inadequacy of the optical trapping model based on ray optics in the case of describing the optical trapping performance of annular and doughnut laser beams is discussed. The inadequacy originates from neglecting the complex focused field distributions of such beams, such as polarization and phase, and thus leads to erroneous predictions of trapping force. Instead, the optical trapping model based on the vectorial diffraction theory, which considers the exact field distributions of a beam in the focal region, needs to be employed for the determination of the trapping force exerted on small particles. The theoretical predictions of such a trapping model agree with the experimentally measured results.

© 2005 Optical Society of America

OCIS Codes
(110.0180) Imaging systems : Microscopy
(140.7010) Lasers and laser optics : Laser trapping
(260.1960) Physical optics : Diffraction theory

ToC Category:
Research Papers

Original Manuscript: January 12, 2005
Revised Manuscript: January 12, 2005
Published: February 21, 2005

Djenan Ganic, Xiaosong Gan, and Min Gu, "Optical trapping force with annular and doughnut laser beams based on vectorial diffraction," Opt. Express 13, 1260-1265 (2005)

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  1. A. Ashkin, J. M. Dziedzic, and T. Yamane, "Optical trapping and manipulation of single cells using infrared laser beams," Nature 330, 769-771 (1987). [CrossRef] [PubMed]
  2. A. Ashkin, "Forces of a single-beam gradient laser trap on a dielectric sphere in the ray optics regime," Biophys. J. 61, 569-581 (1992). [CrossRef] [PubMed]
  3. M. Gu, D. Morrish, and P. C. Ke, "Enhancement of transverse trapping efficiency for a metallic particle using an obstructed laser beam," Appl. Phys. Lett. 77, 34-36 (2000). [CrossRef]
  4. D. Ganic, X. Gan, M. Gu, M. Hain, S. Somalingam, S. Stankovic, and T. Tschudi, "Generation of doughnut laser beams by use of a liquid-crystal cell with a conversion efficiency near 100%," Opt. Lett. 27, 1351-1353 (2002). [CrossRef]
  5. W. M. Lee and X. C. Yuan, "Observation of three-dimensional optical stacking of microparticles using a single Laguerre-Gaussian beam," Appl. Phys. Lett. 83, 5124-5126 (2003). [CrossRef]
  6. V. R. Daria, P. J. Rodrigo, and J. Glückstad, "Dynamic array of dark optical traps," Appl. Phys. Lett. 84, 323-325 (2004). [CrossRef]
  7. M. Gu, J. B. Haumonte, Y. Micheau, and J. W. M. Chon, "Laser trapping and manipulation under focused evanescent wave illumination," App. Phys. Lett. 84, 4236-4238 (2004). [CrossRef]
  8. D. Ganic, X. Gan, and M. Gu, "Trapping force and optical lifting under focused evanescent wave illumination," Opt. Express 12, 5533-5538 (2004). <a href="http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-22-5533.">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-22-5533.</a> [CrossRef] [PubMed]
  9. J. W. M. Chon, X. Gan, and M. Gu, "Splitting of the focal spot of a high-numerical aperture objective in free space," Appl. Phys. Lett. 81, 1576-1578 (2002). [CrossRef]
  10. D. Ganic, X. Gan, and M. Gu, "Focusing of doughnut laser beams by a high numerical-aperture objective in free space," Opt. Express 11, 2747-2752 (2003). <a href="http://www.opticsexpress.org/abstract.cfm?URI=OPEX-11-21-2747.">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-11-21-2747.</a> [CrossRef] [PubMed]
  11. D. Ganic, X. Gan, and M. Gu, "Exact radiation trapping force calculation based on vectorial diffraction theory," Opt. Express 12, 2670-2675 (2004). <a href="http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-12-2670.">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-12-2670.</a> [CrossRef] [PubMed]
  12. N. B. Simpson, D. McGloin, K. Dholakia, L. Allen, and M. Padgett, "Optical tweezers with increased axial trapping efficiency," J. Mod. Opt. 45, 1943-1949 (1998). [CrossRef]
  13. A. T. O'Neil and M. J. Padgett, "Axial and latteral trapping efficiency of Laguerre-Gaussian modes in inverted optical tweezers," Opt. Commun. 193, 45-50 (2001). [CrossRef]

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