A1 Journal article (refereed)
Complete tunneling of acoustic waves between piezoelectric crystals (2023)

Geng, Z., & Maasilta, I. J. (2023). Complete tunneling of acoustic waves between piezoelectric crystals. Communications Physics, 6, Article 178. https://doi.org/10.1038/s42005-023-01293-y

JYU authors or editors

Publication details

All authors or editorsGeng, Zhuoran; Maasilta, Ilari J.

Journal or seriesCommunications Physics


Publication year2023

Publication date14/07/2023


Article number178

PublisherSpringer Science and Business Media LLC

Publication countryUnited Kingdom

Publication languageEnglish


Publication open accessOpenly available

Publication channel open accessOpen Access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/88764

Web address of parallel published publication (pre-print)https://arxiv.org/abs/2209.08287


The mechanical displacements in piezoelectric materials carry along macroscopic electric fields, allowing tunneling of acoustic waves across a vacuum gap beyond the charge-charge interaction distance. However, no rigorous proof of complete acoustic wave tunneling has been presented, and the conditions to achieve complete tunneling have not been identified. Here, we demonstrate analytically the condition for such phenomenon for arbitrary anisotropic crystal symmetries and orientations, and that complete transmission of the incoming wave occurs at the excitation frequency of leaky surface waves. We also show that the complete transmission condition can be related to the surface electric impedance and the effective surface permittivity of the piezoelectric material, relevant to realize the complete tunneling experimentally. We support our findings with numerical results for the maximum power transmittance of a slow transverse wave tunneling between identical ZnO crystals. The results show that complete tunneling can be achieved for a large range of orientations.

Keywordsacoustics (phonics)surfacescrystalsphononswave motionelectric fields

Free keywordsacoustics; optomechanics; surfaces, interfaces and thin films

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Ministry reportingYes

Reporting Year2023

JUFO rating2

Last updated on 2024-03-07 at 01:27