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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 4 — Feb. 14, 2011
  • pp: 3703–3714

Optical trapping force combining an optical fiber probe and an AFM metallic probe

Binghui Liu, Lijun Yang, and Yang Wang  »View Author Affiliations

Optics Express, Vol. 19, Issue 4, pp. 3703-3714 (2011)

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A high-resolution optical trapping and manipulating scheme combining an optical fiber probe and an AFM metallic probe is proposed. This scheme is based on the combination of evanescent illumination and light scattering at the metallic probe apex, which shapes the optical field into a localized, three-dimensional optical trap. Detailed simulations of the electromagnetic fields in composite area and the resulting forces are described the methods of Maxwell stress tensor and three-dimensional FDTD. Calculations show that the scheme is able to overcome the disturbance of other forces to trap a polystyrene particle of up to 10nm in radius with lower laser intensity (~1040W/mm2) than that required by conventional optical tweezers (~105W/mm2). Based on the discussion of high manipulating efficiency dependent on system parameters and the implementing procedure, the scheme allowing for effective manipulation of nano-particles opens a way for research on single nano-particle area.

© 2011 OSA

OCIS Codes
(020.7010) Atomic and molecular physics : Laser trapping
(170.5810) Medical optics and biotechnology : Scanning microscopy
(180.4243) Microscopy : Near-field microscopy

ToC Category:
Optical Trapping and Manipulation

Original Manuscript: January 6, 2011
Revised Manuscript: January 31, 2011
Manuscript Accepted: January 31, 2011
Published: February 10, 2011

Virtual Issues
Vol. 6, Iss. 3 Virtual Journal for Biomedical Optics

Binghui Liu, Lijun Yang, and Yang Wang, "Optical trapping force combining an optical fiber probe and an AFM metallic probe," Opt. Express 19, 3703-3714 (2011)

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