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<p>To design and optimize piezoelectric quasicrystal (PQC) surface acoustic wave (SAW) devices, a detailed study of surface wave propagation—specifically Rayleigh and Love waves—in PQC-layered structures with weak interfaces is conducted. A hybrid Legendre–Laguerre polynomial approach is developed to analytically solve the wave dynamic equations in these structures, overcoming the limitations of traditional Laguerre polynomial methods. The interplay between piezoelectric effects and weak interface characteristics is thoroughly analyzed. Notably, new phenomena are uncovered: weak interfaces in the phonon and phason fields reduce structural stiffness, whereas weak interfaces in the electric field increase it. These effects are especially prominent at frequencies exhibiting significant dispersion. Additionally, the weak interface is found to diminish the piezoelectric coupling of phonon modes in Love waves. The findings provide a strong theoretical basis for the design and optimization of PQC-based SAW devices.</p>

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Surface wave propagation in one-dimensional layered substrate composed of hexagonal piezoelectric quasicrystals with an imperfect interface

  • 期刊论文

  • 发表日期：

    2025年7月28日

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  • Amita Soni,
  • Ohoud Aljawi,
  • Abdulkafi Mohammed Saeed,
  • Abdul Hamid Ganie,
  • Anjali Chaudhary,
  • Aryan Manna

摘要

To design and optimize piezoelectric quasicrystal (PQC) surface acoustic wave (SAW) devices, a detailed study of surface wave propagation—specifically Rayleigh and Love waves—in PQC-layered structures with weak interfaces is conducted. A hybrid Legendre–Laguerre polynomial approach is developed to analytically solve the wave dynamic equations in these structures, overcoming the limitations of traditional Laguerre polynomial methods. The interplay between piezoelectric effects and weak interface characteristics is thoroughly analyzed. Notably, new phenomena are uncovered: weak interfaces in the phonon and phason fields reduce structural stiffness, whereas weak interfaces in the electric field increase it. These effects are especially prominent at frequencies exhibiting significant dispersion. Additionally, the weak interface is found to diminish the piezoelectric coupling of phonon modes in Love waves. The findings provide a strong theoretical basis for the design and optimization of PQC-based SAW devices.