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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 6 — Mar. 22, 2004
  • pp: 1179–1184

Torque-generating malaria-infected red blood cells in an optical trap

J.A. Dharmadhikari, S. Roy, A.K. Dharmadhikari, S. Sharma, and D. Mathur  »View Author Affiliations

Optics Express, Vol. 12, Issue 6, pp. 1179-1184 (2004)

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We have used optical tweezers to trap normal and Plasmodium-infected red blood cells (iRBCs). Two different facets of the behavior of RBCs in infrared light fields emerge from our experiments. Firstly, while the optical field modifies both types of RBCs in the same fashion, by folding the original biconcave disk into a rod-like shape, iRBCs rotate with linearly polarized light whereas normal RBCs do not. Secondly, and in the context of known molecular motors, our measurements indicate that the torque of rotating iRBCs is up to three orders of magnitude larger.

© 2004 Optical Society of America

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(170.1420) Medical optics and biotechnology : Biology
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation

ToC Category:
Research Papers

Original Manuscript: January 20, 2004
Revised Manuscript: March 17, 2004
Published: March 22, 2004

J. Dharmadhikari, S. Roy, A. Dharmadhikari, S. Sharma, and Deepak Mathur, "Torque-generating malaria-infected red blood cells in an optical trap," Opt. Express 12, 1179-1184 (2004)

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