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Tuesday, May 24, 2011

Optimization of computer-generated holograms for dynamic optical manipulation with uniform structured light spots

Jing Bu, Guanghui Yuan, Yuyang Sun, Siwei Zhu, and Xiaocong Yuan

An optimized iterative technique combining the merits of conventional Gerchber-Saxton (G-S) and adaptive-additive (A-A) algorithms to design multilevel computer-generated holograms for the creation of a desirable structured intensity pattern for multiple optical manipulation is theoretically adopted. Optical trap arrays are demonstrated with the help of liquid crystal spatial light modulator and a microscopic optical tweezer system. Additionally, continuous locked-in transport and deflection of microparticles with the generated optical lattice is proven experimentally. The proposed method possesses apparent high efficiency, high uniformity, and dynamic and reconfigurable advantages.

DOI

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