Enhanced particle guiding using supercontinuum radiation

Pascal Fischer, Antonia E. Carruthers, Karen Volke-Sepulveda, Ewan M. Wright, Helen Little, Christian T.A. Brown, Wilson Sibbett, Kishan Dholakia

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

1 Scopus citations


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.

Original languageEnglish (US)
Title of host publicationOptical Trapping and Optical Micromanipulation III
StatePublished - 2006
EventOptical Trapping and Optical Micromanipulation III - San Diego, CA, United States
Duration: Aug 13 2006Aug 17 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherOptical Trapping and Optical Micromanipulation III
Country/TerritoryUnited States
CitySan Diego, CA


  • Bandwidth dependent light properties
  • Chromatic aberration
  • Particle guiding

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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