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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 31 — Nov. 1, 2009
  • pp: G33–G37

Stable optical trapping of latex nanoparticles with ultrashort pulsed illumination

Arijit Kumar De, Debjit Roy, Aveek Dutta, and Debabrata Goswami  »View Author Affiliations

Applied Optics, Vol. 48, Issue 31, pp. G33-G37 (2009)

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Here we report how ultrafast pulsed illumination at low average power results in a stable three- dimensional (3D) optical trap holding latex nanoparticles which is otherwise not possible with continuous wave lasers at the same power level. The gigantic peak power of a femtosecond pulse exerts a huge instantaneous gradient force that has been predicted theoretically earlier and implemented for microsecond pulses in a different context by others. In addition, the resulting two-photon fluorescence allows direct observation of trapping events by providing intrinsic 3D resolution.

© 2009 Optical Society of America

OCIS Codes
(300.2530) Spectroscopy : Fluorescence, laser-induced
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

Original Manuscript: April 16, 2009
Revised Manuscript: June 24, 2009
Manuscript Accepted: July 6, 2009
Published: July 22, 2009

Virtual Issues
Vol. 4, Iss. 13 Virtual Journal for Biomedical Optics

Arijit Kumar De, Debjit Roy, Aveek Dutta, and Debabrata Goswami, "Stable optical trapping of latex nanoparticles with ultrashort pulsed illumination," Appl. Opt. 48, G33-G37 (2009)

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