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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 23 — Nov. 8, 2010
  • pp: 24287–24292

Gradient forces on double-negative particles in optical tweezers using Bessel beams in the ray optics regime

Leonardo A. Ambrosio and Hugo E. Hernández-Figueroa  »View Author Affiliations

Optics Express, Vol. 18, Issue 23, pp. 24287-24292 (2010)

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Gradient forces on double negative (DNG) spherical dielectric particles are theoretically evaluated for v-th Bessel beams supposing geo-metrical optics approximations based on momentum transfer. For the first time in the literature, comparisons between these forces for double positive (DPS) and DNG particles are reported. We conclude that, contrary to the conventional case of positive refractive index, the gradient forces acting on a DNG particle may not reverse sign when the relative refractive index n goes from |n| > 1 to |n| < 1, thus revealing new and interesting trapping properties.

© 2010 OSA

OCIS Codes
(080.0080) Geometric optics : Geometric optics
(350.3618) Other areas of optics : Left-handed materials
(160.3918) Materials : Metamaterials
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Optical Trapping and Manipulation

Original Manuscript: August 6, 2010
Revised Manuscript: October 22, 2010
Manuscript Accepted: October 28, 2010
Published: November 5, 2010

Virtual Issues
Vol. 6, Iss. 1 Virtual Journal for Biomedical Optics

Leonardo A. Ambrosio and Hugo E. Hernández-Figueroa, "Gradient forces on double-negative particles in optical tweezers using Bessel beams in the ray optics regime," Opt. Express 18, 24287-24292 (2010)

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