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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 25 — Dec. 6, 2010
  • pp: 26499–26504

Supercontinuum trap stiffness measurement using a confocal approach

Zhe Zhang, Haifeng Li, Peng Li, Kebin Shi, Perry Edwards, Fiorenzo Omenetto, Mark Cronin-Golomb, Guizhong Zhang, and Zhiwen Liu  »View Author Affiliations

Optics Express, Vol. 18, Issue 25, pp. 26499-26504 (2010)

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We report a novel method for characterizing the stiffness of white light supercontinuum tweezers, in which the nonlinear photonic crystal fiber used for supercontinuum generation is also utilized as an effective confocal pinhole to track the motion of a trapped bead and as a scan head to realize rapid scanning of the optical trap. By measuring the phase of the bead’s motion in following the trap, a lateral stiffness value of about 7.9 μN/m was obtained with supercontinumm power of about 75mW. Our technique can potentially allow for trap stiffness calibration along an arbitrary direction in three dimensions.

© 2010 OSA

OCIS Codes
(020.7010) Atomic and molecular physics : Laser trapping
(350.4855) Other areas of optics : Optical tweezers or optical manipulation
(320.6629) Ultrafast optics : Supercontinuum generation

ToC Category:
Optical Trapping and Manipulation

Original Manuscript: October 13, 2010
Revised Manuscript: November 21, 2010
Manuscript Accepted: November 21, 2010
Published: December 2, 2010

Zhe Zhang, Haifeng Li, Peng Li, Kebin Shi, Perry Edwards, Fiorenzo Omenetto, Mark Cronin-Golomb, Guizhong Zhang, and Zhiwen Liu, "Supercontinuum trap stiffness measurement using a confocal approach," Opt. Express 18, 26499-26504 (2010)

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