Optical trapping performance of circular Pearcey beams on Mie particles

We focused on investigating the trapping characteristics of the circular Pearcey beam (CPB) on Mie particles. To study the trapping performance of CPB on particles of different sizes, we employed the generalized Lorenz-Mie theory (GLMT) for analysis. Our results revealed that the CPB exhibits a stronger optical trapping force for a larger Mie particle. To validate our findings, we constructed an experimental setup of optical tweezers and demonstrated the enhanced trapping performance of the CPB for larger Mie particles. Moreover, we discovered that, compared to the conventional circular Airy beam with the same focusing length, CPB also presents a significantly better trapping performance. Finally, by adjusting the spatial distribution factor of the CPB, we can effectively control the trapping performance in optical manipulation. The relationship between the trapping force properties of the CPB and the spatial distribution factor can be formulated as an exponential function. Overall, our study provides valuable insights into the optical trapping potential of autofocusing beams, particularly the CPB. These findings open up different avenues for the development of photonic tools in the field of optical trapping and manipulation.