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Proceedings Paper

Inclined dual-fiber optical tweezers: modeling and experiments
Author(s): Yuxiang Liu; Miao Yu
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Paper Abstract

Inclined dual-fiber optical tweezers (DFOTs) are investigated both numerically and experimentally. In simulations, the trapping forces of the inclined DFOTs and the single-fiber optical tweezers (SFOTs) are studied along two directions. By comparing the simulation results of the inclined DFOTs and the SFOTs, the inclined DFOTs are found to have more symmetric performance, stronger trapping forces, and more reliable functionality. The spring constant of the DFOTs was calibrated experimentally along one direction. The calibration results agree with those obtained in simulations. Moreover, we created multiple optical traps with an inclined dual-fiber optical tweezers setup. Multiple optical traps were formed at different vertical levels. We demonstrated that this fiber-based trapping system can perform multiple functions, such as particle grouping and stacking. Compared with those formed with objective-based optical tweezers, the multiple traps presented here are small in size and independent of the objective or the substrate, and hence hold the promise to be integrated in microfluidic systems. The inclined DFOTs capable of multiple trapping can be used for on-chip parallel manipulation.

Paper Details

Date Published: 20 August 2009
PDF: 8 pages
Proc. SPIE 7400, Optical Trapping and Optical Micromanipulation VI, 740027 (20 August 2009); doi: 10.1117/12.826693
Show Author Affiliations
Yuxiang Liu, Univ. of Maryland, College Park (United States)
Miao Yu, Univ. of Maryland, College Park (United States)


Published in SPIE Proceedings Vol. 7400:
Optical Trapping and Optical Micromanipulation VI
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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