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Updated: Jun 12, 2025

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
Published on: August 21, 2018
Generating Airy surface acoustic waves with dislocated interdigital transducers
Zongjun Ma1,2,3, Delai Kong1,2,3, Wenfeng Cai1,2,3
1Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China. yjliu@sustech.edu.cn.
Abstract:
We propose an innovative design for interdigital transducers (IDTs), enabling phase modulation of surface acoustic waves (SAWs) with a dislocated electrode structure. By designing the size and arrangement of these dislocated IDTs, a novel type of Airy SAWs can be generated, exhibiting self-accelerating, self-bending, and self-healing characteristics. The acceleration of the generated Airy SAW is 0.081 cm-1. Furthermore, particles and bubbles can be precisely manipulated using the generated Airy SAW. The proposed dislocated IDTs could be used for generation of many other types of SAWs, hence holding great promise for applications including SAW shaping, particle manipulation/sorting, and acoustic sensing/detection.
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