Inverse‐Design Methodology for Generating Twisted Ultrasonic Motor in Free Space

A new level of freedom is made possible by orbital angular momentum (OAM), which can be used to create twisted ultrasonic motors for particle manipulation and control. For steady free‐flowing management, it essential produce acoustic OAM beams high order quality. However, this task difficult due the phased array's fundamental restriction insufficient resolution or aperture. Herein, a generic approach presented inverse design that may improve beam quality in free space. In comparison previous direct‐design method, up 14% improvement amplitude uniformity 12 dB signal‐to‐noise ratio (SNR) modes are achieved. These notable benefits enable motor operate with straightforward compact system while enabling rotation space an undersampled array, not conventional technique. This study paves way effective control, high‐fidelity communication, other OAM‐based technologies providing inverse‐design framework optimizing OAM.