A study about multi-trapping of a tapered-tip single fiber optical tweezers

Liang Pei-Bo, Lei Jiao-Jie, Liu Zhi-Hai, Zhang Yu, Yuan Li-Bo

We develop a pair of tapered-tip single fiber optical tweezers, and study its multi-trapping characteristic. The finite difference time domain (FDTD) method is employed to simulate the trapping force characteristic of this pair of single fiber optical tweezers, and the results show that the number of the trapped particles depends on the refractive index and the size of the particles. The trapping force of this pair of tapered-tip single fiber optical tweezers is calibrated by the experimental method, and the experimental results are consistent with the theoretical calculation results. The multi-trapping capability realized by the tapered-tip single fiber optical tweezers will be practical and useful for some applications in biomedical researching fields.

DOI