期刊论文

Wang, N

英文

New Journal of Physics

1367-2630

2023

25

9

093048

10.1088/1367-2630/acf6da

This work is supported by the National Science Foundation of China (No. 12104069, No. 12174263, and No. 1904237), the Natural Science Foundation of Hunan Province (Grant No. 2021JJ40554), the Open Research Fund of Hunan Provincial Key Laboratory of Flexibl [12104069, 12174263, 1904237]; National Science Foundation of China [2021JJ40554]; Natural Science Foundation of Hunan Province [202007]; Open Research Fund of Hunan Provincial Key Laboratory of Flexible Electronic Materials Genome Engineering [2020A1515010669]; Natural Science Foundation of Guangdong Province

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Exceptional points (EPs) in non-Hermitian systems embody abundant new physics and trigger various novel applications. In the optical force system, the motion of a particle near its equilibrium position is determined by the optical force stiffness matrix (OFSM), which is inherently non-Hermitian when the particle is illuminated by vortex beams. In this study, by exploiting the rapid variations in eigenvalues and the characteristics of particle motion near EPs of the OFSM, we propose a method to sort particles with subtle differences in their radii or refractive indices based on their trajectori...