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14 November 2002 Formation and dynamic manipulation of an assembly of micro- and nano-scale particles
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Abstract
We propose the use of a multiple-beam optical tweezer (MOT) system for the formation and active manipulation of an assembly of micro- and nano-scale particles. This method enables the study of arrays of particles for practical applications in all-optical control of an array of pumps, switches and valves for micro-fluidic processes, bio-chemical sensing or lab-on-a-chip devices and guided assembly of colloidal structures to form photonic crystals. A fully dynamic MOT system is constructed using the generalized phase contrast (GPC) method and a phase-only spatial light modulator (SLM). The GPC method enables loss-less light projection and direct transformation of an input phase pattern to an array of high-intensity beams. This straightforward process enables an adjustable number of traps and instantaneous control of the position, size, shape and intensity of each trapping-beam by encoding the appropriate phase pattern on the SLM. We present experimental results showing trapping and dynamic manipulation of multiple micro-spheres in a liquid solution.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vincent Ricardo Daria, Peter J. Rodrigo, Rene L. Eriksen, and Jesper Gluckstad "Formation and dynamic manipulation of an assembly of micro- and nano-scale particles", Proc. SPIE 4937, Biomedical Applications of Micro- and Nanoengineering, (14 November 2002); https://doi.org/10.1117/12.476085
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