Diffusion dynamics in an advanced optical trap

Svetlana Tatarkova, Kishan Dholakia

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Stochastic processes play a key role in the communications inside the cells, cell mitosis and membrane channel regulation. It has been suggested that the molecular transport mechanism can be based on rectified thermal diffusion in a Brownian ratchet. A two-dimensional optical potential of circular symmetry created by a Bessel light beam is an ideal playground to study these phenomena. This optical field can be tilted to create a periodic (washboard) potential of imperfect Brownian ratchet. The tilt variation induces a directed transport of microparticles or biomolecules across the potential barriers when biomolecules attached non-covalently to these microparticles. In the central maximum of Bessel beam particles can be guided due to radiation pressure. Our data offer a new venue for understanding of cooperative phenomena in biology.

Original languageEnglish
Title of host publicationEuropean Conference on Biomedical Optics, ECBO 2003
PublisherOptica Publishing Group (formerly OSA)
Number of pages7
ISBN (Electronic)0819450111
Publication statusPublished - 2003
EventEuropean Conference on Biomedical Optics, ECBO 2003 - Munich, Germany
Duration: 2003 Jun 22 → …

Publication series

NameOptics InfoBase Conference Papers
ISSN (Electronic)2162-2701


ConferenceEuropean Conference on Biomedical Optics, ECBO 2003
Period03/6/22 → …

Bibliographical note

Publisher Copyright:
© 2003 SPIE-OSA.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials


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