Abstract
The trapping stiffness and width are two important parameters to characterize a counter-propagating dual-beam optical trap. We present two types of asymmetric counter-propagating dual-beam optical trap with the different numerical aperture (NA) and trapping power to eliminate the multi-equilibrium positions when two foci of the optical trap are not coincided. Meanwhile, the asymmetric dual-beam trap with the different NA enhances the axial trapping width and stiffness over five and three times, respectively, higher than the standard dual-beam trap with the higher and same average NA. Besides, it increases the transverse trapping stiffness when two foci are not coincided. The asymmetric dual-beam optical trap will benefit the future applications for the study of precision measurement, basic physics and biomaterials.
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Data Availability Statement
This manuscript has no associated data or the data will not be deposited. [Authors’ comment: There is no data in the manuscript because we see that it is more convenient to represent the obtained results in figures.]
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Acknowledgements
This work is supported by the National Natural Science Foundation of China (61975237, 11904405), Scientific Research Project of National University of Defense Technology (ZK20-14) and Independent Scientific Research Project of National University of Defense Technology (ZZKY-YX-07-02)
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The idea was proposed by Zhijie Chen and Guangzong Xiao, and the results were done and analyzed by Zhijie Chen, Wei Xiong. The paper was written by all authors.
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Chen, Z., Xiong, W., Kuang, T. et al. Enhancing the performance of the counter-propagating dual-beam optical trap with the asymmetric configuration. Eur. Phys. J. D 76, 13 (2022). https://doi.org/10.1140/epjd/s10053-021-00333-y
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DOI: https://doi.org/10.1140/epjd/s10053-021-00333-y