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Thursday, July 28, 2011

Hybrid optical tweezers for dynamic micro-bead arrays

Yoshio Tanaka, Shogo Tsutsui, Mitsuru Ishikawa, and Hiroyuki Kitajima

Dynamic micro-bead arrays offer great flexibility and potential as sensing tools in various scientific fields. Two optical trapping techniques, the GPC method using a spatial light modulator and a mechanical scanning method using galvano mirrors, are combined in a hybrid optical tweezers system to handle dynamic micro-bead arrays. This system provides greater versatility while the GPC method creates massive micro-bead arrays in a 2D space, where the trapped beads can be manipulated smoothly and very quickly in a 3D space using the mechanical scanning method. Four typical examples are demonstrated in real time.

DOI

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