Momentum-Topology-Induced Optical Pulling Force
Hang Li, Yongyin Cao, Bojian Shi, Tongtong Zhu, Yong Geng, Rui Feng, Lin Wang, Fangkui Sun, Yuzhi Shi, Mohammad‐Ali Miri, M. Nieto‐Vesperinas, Cheng‐Wei Qiu, Weiqiang Ding
Abstract
We report an ingenious mechanism to obtain robust optical pulling force by a single plane wave via engineering the topology of light momentum in the background. The underlying physics is found to be the topological transition of the light momentum from a usual convex shape to a starlike concave shape in the carefully designed background, such as a photonic crystal structure. The principle and results reported here shed insightful concepts concerning optical pulling, and pave the way for a new class of advanced optical manipulation technique, with potential applications of drug delivery and cell sorting.