Arbitrary Acoustics Hologram Based on Structured OAM Beams

Abstract

In this study, we present a novel on-chip 2D hologram device of an on-chip hologram device capable of generating both arbitrary 3D nodes and 2D microscale nodes. As the first true 3D hologram folded on chip, our approach combines a refined fabrication process with a novel theoretical framework, which employs Fresnel transformation to describe the patterns, enabling the shaping of patterns in 3D, thus broadening the potential applications of lab-on-chip devices and establishing a new generation of acoustic tweezers. We also reduced the complexity of setup and manufacturing thus achieving high resolution and low tolerance with lithographic techniques. Our work holds promise for a wide range of applications, including biomedical, material handling, and sensing technologies, marking a noteworthy advancement in the pursuit of efficient and precise acoustic manipulation.