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Proceedings Paper

GPC-based counterpropagating-beam traps with unequally sized intensity profiles
Author(s): Peter John Rodrigo; Ivan R. Perch-Nielsen; Jesper Glückstad
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Paper Abstract

The three-dimensional forces acting on a dielectric microparticle illuminated by two counterpropagating beams with variable intensity profiles are theoretically studied. Size-adjustable intensity profiles of the constituent beams are easily implemented using the generalized phase contrast (GPC) method. Our numerical calculations include the dependence of the axial and transverse trapping forces with location of the microsphere between the opposing beams. These numerical results show potential improvement in the large dynamic range for axial position control of microparticles in GPC-based counterpropagating-beam traps - achieved with the use of size-varied constituent tophat beams. We also assess the quality of the obtained trap potentials by calculating the axial and transverse stiffness associated with the optical traps.

Paper Details

Date Published: 11 September 2006
PDF: 5 pages
Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 63262Z (11 September 2006); doi: 10.1117/12.683833
Show Author Affiliations
Peter John Rodrigo, Risø National Lab. (Denmark)
Ivan R. Perch-Nielsen, Risø National Lab. (Denmark)
Jesper Glückstad, Risø National Lab. (Denmark)


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

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