Abstract
A method and mathematical foundation are presented for generating multiple-beam optical tweezers capable of introducing complex trapping beam configurations that enable optical manipulation for a variety of colloidal structures. The method is based on the generalized phase contrast technique for generating high intensity beam patterns from an input phase modulation encoded on a spatial light modulator. The mathematical foundation describes issues concerning how the method provides high photon efficiency adequate for generating large array traps while maintaining dynamic features. Experimental results show multiple trapping of up to 25 particles using a 200 mW laser diode operating at 830 nm. Arbitrary array beam configurations are also shown where the shape, position and size can easily be reconfigured and applied for dynamic manipulation of colloidal particles.
Original language | English |
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Pages (from-to) | 1601-1614 |
Number of pages | 14 |
Journal | Journal of Modern Optics |
Volume | 50 |
Issue number | 10 |
DOIs | |
Publication status | Published - Jul 2003 |
Externally published | Yes |