Holographic generation of arbitrary ultrasonic fields by simultaneous modulation of amplitude and phase

Acoustic holograms have been used widely to generate desired acoustic fields. Following the rapid development of 3D printing technology, the use of holographic lenses has become an efficient method to produce acoustic fields with high resolution and low cost. In this paper, we demonstrate a technique to modulate the amplitude and phase of ultrasonic waves simultaneously using a holographic method with high transmission efficiency and high accuracy. On this basis, we generate an Airy beam with high propagation invariance. We then discuss the advantages and disadvantages of the proposed method when compared with the conventional acoustic holographic method. Finally, we design a sinusoidal curve with a phase gradient and a constant pressure amplitude and realize transport of a particle on a water surface along a curve.

Automated summary

This paper discusses a technique to simultaneously modulate the amplitude and phase of ultrasonic waves using holographic method with high transmission efficiency and accuracy. An Airy beam with high propagation invariance is generated based on this technique, and the advantages and disadvantages of the proposed method are compared with the conventional acoustic holographic method. Furthermore, a sinusoidal curve with a phase gradient and a constant pressure amplitude is designed to achieve the transportation of a particle on a water surface along the curve.