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Proceedings Article

Optical trapping in counter-propagating Bessel beams

[+] Author Affiliations
Tomas Cizmar

Institute of Scientific Instruments (Czech Republic) and Masaryk Univ. (Czech Republic)

Veneranda Garces-Chavez, Kishan Dholakia

Univ. of St. Andrews (United Kingdom)

Pavel Zemanek

Institute of Scientific Instruments (Czech Republic)

Proc. SPIE 5514, Optical Trapping and Optical Micromanipulation, 643 (October 18, 2004); doi:10.1117/12.557188
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From Conference Volume 5514

  • Optical Trapping and Optical Micromanipulation
  • Kishan Dholakia; Gabriel C. Spalding
  • Denver, CO | August 02, 2004

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.

© (2004) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Tomas Cizmar ; Veneranda Garces-Chavez ; Kishan Dholakia and Pavel Zemanek
"Optical trapping in counter-propagating Bessel beams", Proc. SPIE 5514, Optical Trapping and Optical Micromanipulation, 643 (October 18, 2004); doi:10.1117/12.557188; http://dx.doi.org/10.1117/12.557188


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