Optical Particle Sorting in Translating Brownian Liquids

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In this research project, particle sorting of Brownian liquids was explored by sweeping two noncoherent pairs of parallel optical standing waves in a translating medium. Each wave was created by interfering two coherent beams of light, and the resulting fringe periods were determined by the angle of intersection. Adjusting the fringe spacing of wave ridges allows application of an optical force to particles of one size while minimizing or nullifying the force on particles of another size. Exploiting this method is potentially the foundation for a noninvasive cell and virus sorting technique. The random nature of Brownian motion on these particles was also explored. 

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  • 07/19/2018
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