Abstract

Optical guiding of microscopic particles is studied and compared for femtosecond and continuous wave Bessel light beams. We confirm that optical guiding is an average power effect and observe no difference in the guiding velocities for non-fluorescing polymer microspheres. Additionally, we observe second harmonic generation of guided KTP particles. This observation opens up the prospect for optical identification of guided cells for sorting purposes.

© 2004 Optical Society of America

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References

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Appl. Opt. (2)

T.N. Buican, M.J. Smyth, H.A. Crissman, G.C. Salzman, C.C. Stewar t, and J.C. Martin, "Automated single-cell manipulation and sorting by li ght trapping," Appl. Opt. 26, 5311-16 (1987).
[CrossRef] [PubMed]

L. Malmqvist and H.M. Hertz, �??Second harmonic generation in optically trapped nonlinear particles with pulsed lasers,�?? Appl. Opt. 34, 3393 (1995)
[CrossRef]

IEEE J. Quantum. Electron. (1)

Q. Feng, J.V. Moloney, A.C. Newell, E.M. Wright, K. Cook, P.K. Kennedy, D.X. Hammer, B.A. Rockwell and C.R. Thompson, �??Theory and simulation on the threshold of water breakdown induced by focused ultrashort pulses,�?? IEEE J. Quantum. Electron. 33, 127 (1997).
[CrossRef]

J. Opt. Soc. Am. A (1)

Nature (1)

V. Garcés-Chávez, D. McGloin, H. Melville, W. Sibbett and K. Dholakia, �??Simultanoeus micromanipulation multiple planes using a self reconstructing light beam,�?? Nature 419, 145 (2002)
[CrossRef] [PubMed]

Opt. Commun. (1)

J. Arlt, V. Garcés-Chávez, W. Sibbett and K. Dholakia. �??Optical micromanipulation using a Bessel light beam,�?? Opt. Commun. 197, 239 (2001)
[CrossRef]

Opt. Lett. (1)

Phys. Rev. Lett. (1)

A. Ashkin, �??Acceleration and trapping of microscopic particles,�?? Phys. Rev. Lett. 24, 1570 (1970)

Other (1)

<a href="http://www.lsbu.ac.uk/water/vibrat.html">http://www.lsbu.ac.uk/water/vibrat.html</a>

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Figures (5)

Fig. 1.
Fig. 1.

Experimental Bessel beam guiding set up

Fig. 2.
Fig. 2.

Intensity autocorrelation (a) and typical Bessel beam cross-section (b)

Fig. 3.
Fig. 3.

Plot showing guiding velocities of 1µm spheres at 800nm

Fig. 4.
Fig. 4.

Plot of particle convection velocities against wavelength for cw and modelocked regimes.

Fig. 5.
Fig. 5.

Plot of generated relative intensity ln PSH against ln PIN

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