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Proceedings Paper

Optical trapping in counter-propagating Bessel beams
Author(s): Tomas Cizmar; Veneranda Garces-Chavez; Kishan Dholakia; Pavel Zemanek
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Paper Abstract

We present and analyse a method that uses an interference of counter-propagating Bessel beams for 3D confinement of high-index micro-particles in array of optical traps. Due to this interference a sort of standing wave (SW) is created with intensity maxima separated by more than half a wavelength of the trapping beam and arranged along propagation axis. Thanks to the non-diffracting nature of this beam the region of SW existence is much longer comparing to the Gaussian beam of the similar beam diameter. Steep axial optical intensity gradients cause axial optical force that enables 3D particle confinement. Moreover, the self-healing property of Bessel beam suppresses the beam modification due to the presence of confined objects.

Paper Details

Date Published: 18 October 2004
PDF: 9 pages
Proc. SPIE 5514, Optical Trapping and Optical Micromanipulation, (18 October 2004); doi: 10.1117/12.557188
Show Author Affiliations
Tomas Cizmar, Institute of Scientific Instruments (Czech Republic)
Masaryk Univ. (Czech Republic)
Veneranda Garces-Chavez, Univ. of St. Andrews (United Kingdom)
Kishan Dholakia, Univ. of St. Andrews (United Kingdom)
Pavel Zemanek, Institute of Scientific Instruments (Czech Republic)

Published in SPIE Proceedings Vol. 5514:
Optical Trapping and Optical Micromanipulation
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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