Version 1
: Received: 25 June 2024 / Approved: 25 June 2024 / Online: 26 June 2024 (10:00:57 CEST)
How to cite:
Caliendo, C.; Benetti, M.; Cannatà, D.; Laidoudi, F. Experimental and Theoretical Analysis of Rayleigh and Leaky-Sezawa Waves Propagating in ZnO/Fused Silica Substrates. Preprints2024, 2024061804. https://doi.org/10.20944/preprints202406.1804.v1
Caliendo, C.; Benetti, M.; Cannatà, D.; Laidoudi, F. Experimental and Theoretical Analysis of Rayleigh and Leaky-Sezawa Waves Propagating in ZnO/Fused Silica Substrates. Preprints 2024, 2024061804. https://doi.org/10.20944/preprints202406.1804.v1
Caliendo, C.; Benetti, M.; Cannatà, D.; Laidoudi, F. Experimental and Theoretical Analysis of Rayleigh and Leaky-Sezawa Waves Propagating in ZnO/Fused Silica Substrates. Preprints2024, 2024061804. https://doi.org/10.20944/preprints202406.1804.v1
APA Style
Caliendo, C., Benetti, M., Cannatà, D., & Laidoudi, F. (2024). Experimental and Theoretical Analysis of Rayleigh and Leaky-Sezawa Waves Propagating in ZnO/Fused Silica Substrates. Preprints. https://doi.org/10.20944/preprints202406.1804.v1
Chicago/Turabian Style
Caliendo, C., Domenico Cannatà and Farouk Laidoudi. 2024 "Experimental and Theoretical Analysis of Rayleigh and Leaky-Sezawa Waves Propagating in ZnO/Fused Silica Substrates" Preprints. https://doi.org/10.20944/preprints202406.1804.v1
Abstract
Piezoelectric c-axis oriented zinc oxide (ZnO) thin films, from 1.8 up to 6.6 µm thick, have been grown by radio frequency magnetron sputtering technique onto fused silica substrates. A delay line consisting in two interdigital transducers (IDTs) with wavelength λ = 80 µm was photolith-ographically implemented onto the surface of the ZnO layers. Due to the IDTs split finger con-figuration and metallization ratio (0.5), the propagation of both the fundamental, third and nineth harmonic Rayleigh waves is excited; also, three leaky surface acoustic waves (SAWs) were detected travelling at velocity close to that of the longitudinal bulk wave in SiO2. The acoustic waves propagation in ZnO/fused silica was simulated by using 2D finite-element method (FEM) tech-nique to identify the nature of the experimentally detected waves. It turned out that, in addition to the fundamental and harmonic Rayleigh waves, also high-frequency leaky surface waves are ex-cited by the harmonic wavelengths; such modes are identified as leaky-Sezawa (LS) waves under cut-off. The velocity of all the modes was found in good agreement with the theoretically calcu-lated values. The existence of a low-loss region for the Sezawa wave below the cut off was theo-retically predicted and experimentally assessed.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
