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<p>Fixed interdigital transducers (IDTs) are commonly limited to only generate a single type of surface acoustic wave (SAW). Here, we present a programmable IDT array architecture for multidimensional SAW generation, based on standard and chirped IDT array designs. Forty independently addressable IDT units are each modulated by a double-pole-double-throw switch to enable binary phase inversion. This system generates diverse SAW waveforms including non-diffracting Airy SAWs and dynamically focused SAWs. We achieve two-dimensional focus manipulation with sub-wavelength precision and extended focal depth, enabled by time-division multiplexing with chirped IDTs. By combining spatial phase encoding with spectral frequency multiplexing, our approach demonstrates multidimensional control over SAW generation, providing a platform for adaptive acoustic field control in applications such as reconfigurable microfluidics, tuneable metamaterials, and multifrequency sensing systems.</p>

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Multidimensional control of surface acoustic wave generation via programmable interdigital transducer arrays

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月13日

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  • Zongjun Ma,
  • Delai Kong,
  • Zhenming Wang,
  • Ming Cheng,
  • Zixuan Wu,
  • Xueqian Zhao,
  • Ahmed Elbanna,
  • Mengjia Cen,
  • Shifeng Guo,
  • Yan Jun Liu

摘要

Fixed interdigital transducers (IDTs) are commonly limited to only generate a single type of surface acoustic wave (SAW). Here, we present a programmable IDT array architecture for multidimensional SAW generation, based on standard and chirped IDT array designs. Forty independently addressable IDT units are each modulated by a double-pole-double-throw switch to enable binary phase inversion. This system generates diverse SAW waveforms including non-diffracting Airy SAWs and dynamically focused SAWs. We achieve two-dimensional focus manipulation with sub-wavelength precision and extended focal depth, enabled by time-division multiplexing with chirped IDTs. By combining spatial phase encoding with spectral frequency multiplexing, our approach demonstrates multidimensional control over SAW generation, providing a platform for adaptive acoustic field control in applications such as reconfigurable microfluidics, tuneable metamaterials, and multifrequency sensing systems.