Controllable dual-layer twisted array source

The use of array structures in optical communication and trapping significantly enhances information capacity and trapping efficiency, while twisted beams present promising applications in both fields. However, it remains a considerable technical challenge to control and stabilize large-scale twisted beam arrays while ensuring both beam stability and multi-structural integrity. In this study, we constructed a twisted array of Schell-model sources and introduced an array twist parameter to characterize the global rotational characteristics of these randomly fluctuating optical fields. The results show that optimizing parameter settings allows for effective control of the rotational structure of beam arrays, enabling reverse rotation of the dual-layer beam structure. Additionally, the stability of the twisted array structure is effectively maintained through the dual-layer twist characteristics. Precise control of the dual-layer twisted beams enables the creation of complex optical field structures, thereby enhancing the flexibility of optical manipulation and further improving the trapping efficiency of particles and the bandwidth of optical communication.