GPC-based counterpropagating-beam traps with unequally sized intensity profiles

Peter John Rodrigo; Ivan R. Perch-Nielsen; Jesper Glückstad

doi:10.1117/12.683833

11 September 2006 GPC-based counterpropagating-beam traps with unequally sized intensity profiles

Peter John Rodrigo, Ivan R. Perch-Nielsen, Jesper Glückstad

Proceedings Volume 6326, Optical Trapping and Optical Micromanipulation III; 63262Z (2006) https://doi.org/10.1117/12.683833
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

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.

Citation Download Citation

Peter John Rodrigo, Ivan R. Perch-Nielsen, and Jesper Glückstad "GPC-based counterpropagating-beam traps with unequally sized intensity profiles", Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 63262Z (11 September 2006); https://doi.org/10.1117/12.683833

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