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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 14 — Jul. 2, 2012
  • pp: 14928–14937

Calculation of optical forces on an ellipsoid using vectorial ray tracing method

Jin-Hua Zhou, Min-Cheng Zhong, Zi-Qiang Wang, and Yin-Mei Li  »View Author Affiliations

Optics Express, Vol. 20, Issue 14, pp. 14928-14937 (2012)

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For a triaxial ellipsoid in an optical trap with spherical aberration, the optical forces, torque and stress are analyzed using vectorial ray tracing. The torque will automatically regulate ellipsoid’s long axis parallel to optic axis. For a trapped ellipsoid with principal axes in the ratio 1:2:3, the high stress distribution appears in x-z plane. And the optical force at x-axis is weaker than at y-axis due to the shape size. While the ellipsoid departs laterally from trap center, the measurable maximum transverse forces will be weakened due to axial equilibrium and affected by inclined orientation. For an appropriate ring beam, the maximum optical forces are strong in three dimensions, thus, this optical trap is appropriate to trap cells for avoiding damage from laser.

© 2012 OSA

OCIS Codes
(350.4855) Other areas of optics : Optical tweezers or optical manipulation
(080.5692) Geometric optics : Ray trajectories in inhomogeneous media

ToC Category:
Optical Trapping and Manipulation

Original Manuscript: April 18, 2012
Revised Manuscript: May 23, 2012
Manuscript Accepted: June 5, 2012
Published: June 19, 2012

Virtual Issues
Vol. 7, Iss. 9 Virtual Journal for Biomedical Optics

Jin-Hua Zhou, Min-Cheng Zhong, Zi-Qiang Wang, and Yin-Mei Li, "Calculation of optical forces on an ellipsoid using vectorial ray tracing method," Opt. Express 20, 14928-14937 (2012)

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