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Proceedings Paper

Enhanced particle guiding using supercontinuum radiation
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Paper Abstract

We demonstrate the use of supercontinuum radiation to provide enhanced guiding distances of microscopic particles compared to the standard continuous wave or femtosecond lasers. Our technique relies on the chromatic aberration of the lens used to form an elongated focal region within which guiding takes place. The resulting beam profile has been modelled and shows that for a Gaussian input beam, the intensity profile after the lens can be considered as a sum of Gaussians, one for each wavelength but with varying focal position due to dispersion. Our experimental investigations compare radiation from continuous wave (bandwidth <1nm) and femtosecond pulsed (bandwidth > 100nm) lasers as well as supercontinuum radiation (bandwidth > 450nm) and show good agreement with theory.

Paper Details

Date Published: 11 September 2006
PDF: 11 pages
Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 63261G (11 September 2006); doi: 10.1117/12.678080
Show Author Affiliations
Pascal Fischer, Univ. of St. Andrews (United Kingdom)
Antonia E. Carruthers, Univ. of St. Andrews (United Kingdom)
Karen P. Volke-Sepulveda, Univ. Nacional Autónoma de México (Mexico)
Ewan M. Wright, Univ. of St. Andrews (United Kingdom)
Univ. of Arizona (United States)
Helen Little, Univ. of St. Andrews (United Kingdom)
Christian T. A. Brown, Univ. of St. Andrews (United Kingdom)
Wilson Sibbett, Univ. of St. Andrews (United Kingdom)
Kishan Dholakia, Univ. of St. Andrews (United Kingdom)
Univ. of Arizona (United States)


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

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