A multiple-trap single-beam scanning laser tweezer system was developed and characterized. Different stationary and mobile multiple-trap modes were generated for polystyrene beads in a water environment. Trapping efficiency and stability were investigated for several dynamic parameters such as transition time between the sites, waiting time on a single site, number of trapping sites, and IR laser power. Optimal parameters for efficient generation of complex arrays and matrices were determined. We demonstrate an example of a single laser beam multiple-trap application by measuring the trap’s stiffness in water for our laser tweezer setup.
© 2005 Optical Society of America
Original Manuscript: September 22, 2004
Revised Manuscript: January 26, 2005
Manuscript Accepted: January 31, 2005
Published: July 1, 2005
Daniel S. Kaputa, Andrey N. Kuzmin, Aliaksandr V. Kachynski, Alexander N. Cartwright, and Paras N. Prasad, "Dynamics of multiple trapping by a single-beam laser tweezer," Appl. Opt. 44, 3963-3968 (2005)