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Proceedings Paper

Optical binding in non-diffracting beams
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Paper Abstract

Optical binding forces are present always when two and more colloidal particles are confined by external optical forces in a limited volume. They are caused by rescattering of the original incident field and they manifest themselves by a specific stationary displacements between confined micro-objects. Under certain circumstances the objects can self-organize into spatial arrangements creating so called optically bound matter. Detailed understanding of these forces might enable one to control this behavior. In this paper we present a theoretical study of the object self-organization in the field of two counter-propagating spatially incoherent non-diffracting beams. The field is uniform along the axis of propagation and so the studied phenomenon does not depend on the axial position of micro-objects. Therefore in this system the binding forces can be simply separated from the external forces of trapping field. We also compare this situation with setup of two counter-propagating Gaussian beams which are routinely used for studies of optical binding effects.

Paper Details

Date Published: 11 September 2006
PDF: 9 pages
Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 632608 (11 September 2006); doi: 10.1117/12.680612
Show Author Affiliations
Vítězslav Karásek, Institute of Scientific Instruments (Czech Republic)
Tomáš Čižmár, Institute of Scientific Instruments (Czech Republic)
Pavel Zemánek, Institute of Scientific Instruments (Czech Republic)

Published in SPIE Proceedings Vol. 6326:
Optical Trapping and Optical Micromanipulation III
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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