Enhanced optical guiding of colloidal particles using a supercontinuum light source

P Fischer, A E Carruthers, K Volke-Sepulveda, E M Wright, Christian Thomas Alcuin Brown, Wilson Sibbett, Kishan Dholakia

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


We demonstrate enhanced optical guiding distances for microscopic particles using a supercontinuum light beam. The enhanced spectral bandwidth of the source leads to an elongated focal region. As a result we obtain a significant radial gradient force and axial radiation pressure force over a longer distance when compared to a monochromatic Gaussian beam. The guiding distances of up to 3mm that are observed for micron-sized particles with the supercontinuum beam are approximately twice those observed using continuous wave and femtosecond laser sources when considering beams of equivalent diameter. This guiding scheme is expected to be applicable to colloidal particles, biological cells and cold atom ensembles. (c) 2006 Optical Society of America.

Original languageEnglish
Pages (from-to)5792-5802
Number of pages11
JournalOptics Express
Issue number12
Publication statusPublished - 12 Jun 2006




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