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dc.contributor.authorDorizzi, R.R.
dc.contributor.authorUlanowski, Z.
dc.date.accessioned2009-12-08T15:41:19Z
dc.date.available2009-12-08T15:41:19Z
dc.date.issued2008
dc.identifier.citationDorizzi , R R & Ulanowski , Z 2008 , Theoretical determination of the radiation force for a spherical particle illuminated by a focused laser beam . in Procs. 11th Electromagnetic and Light Scattering Conference 2008, University of Hertfordshire . vol. 2008 , Procs. 11th Electromagnetic and Light Scattering Conference , pp. 307-310 .
dc.identifier.otherPURE: 13507215
dc.identifier.otherPURE UUID: 95feadca-59b4-4492-ba2e-f5e8c577de09
dc.identifier.otherdspace: 2299/4081
dc.identifier.otherORCID: /0000-0003-4761-6980/work/32374645
dc.identifier.urihttp://hdl.handle.net/2299/4081
dc.description.abstractTrapping forces on dielectric spheres in single beam laser tweezers are computed. A focused beam description based on an exact solution of Maxwell’s equations is compared to the 5th order Gaussian beam approximation due to Barton and Alexander. Forces on water droplets suspended in air and on polystyrene spheres suspended in water, exerted by beams focused to varying degree, are calculated. It is demonstrated that the 5th order approximation is accurate for almost paraxial beams (numerical aperture NA<0.25), as compared to the exact treatment. However, for strongly focused beams the 5th order approximation breaks down. Thus it is established that accurate beam description is vital for modeling optical traps, since in order to hold a particle effectively in a single beam trap a strongly focused beam is required.en
dc.language.isoeng
dc.relation.ispartofProcs. 11th Electromagnetic and Light Scattering Conference 2008, University of Hertfordshire
dc.relation.ispartofseriesProcs. 11th Electromagnetic and Light Scattering Conference
dc.titleTheoretical determination of the radiation force for a spherical particle illuminated by a focused laser beamen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionMathematical and Theoretical Physics
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.contributor.institutionDepartment of Physics, Astronomy and Mathematics
rioxxterms.typeOther
herts.preservation.rarelyaccessedtrue


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