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Optics Letters

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  • Vol. 21, Iss. 14 — Jul. 15, 1996
  • pp: 1090–1092

Cell damage in near-infrared multimode optical traps as a result of multiphoton absorption

K. König, H. Liang, M. W. Berns, and B. J. Tromberg  »View Author Affiliations


Optics Letters, Vol. 21, Issue 14, pp. 1090-1092 (1996)
http://dx.doi.org/10.1364/OL.21.001090


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Abstract

We report on cell damage of single cells confined in continuous-wave (cw), near-infrared (NIR) multimode optical traps as a result of multiphoton absorption phenomena. Trapping beams at NIR wavelengths less than 800 nm are capable of damaging cells through a two-photon absorption process. Cell damage is more pronounced in multimode cw traps compared with single-frequency true cw NIR traps because of transient power enhancement by longitudinal mode beating. Partial mode locking in tunable cw Ti:sapphire lasers used as trapping beam sources can produce unstable subnanosecond pulses at certain wavelengths that amplify multiphoton absorption effects significantly. We recommend the use of single-frequency long-wavelength NIR trapping beams for optical micromanipulation of vital cells.

© 1996 Optical Society of America

History
Original Manuscript: January 18, 1996
Published: July 15, 1996

Citation
K. König, H. Liang, M. W. Berns, and B. J. Tromberg, "Cell damage in near-infrared multimode optical traps as a result of multiphoton absorption," Opt. Lett. 21, 1090-1092 (1996)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-21-14-1090


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