20 August 2009 Inclined dual-fiber optical tweezers: modeling and experiments
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Proceedings Volume 7400, Optical Trapping and Optical Micromanipulation VI; 740027 (2009); doi: 10.1117/12.826693
Event: SPIE NanoScience + Engineering, 2009, San Diego, California, United States
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.
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Yuxiang Liu, Miao Yu, "Inclined dual-fiber optical tweezers: modeling and experiments", Proc. SPIE 7400, Optical Trapping and Optical Micromanipulation VI, 740027 (20 August 2009); doi: 10.1117/12.826693; https://doi.org/10.1117/12.826693
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KEYWORDS
Particles

Optical tweezers

Calibration

Geometrical optics

Scattering

Fiber optics

Laser scattering

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