Abstract

Our aim is to study acoustic wave devices for sensing applications in gas or liquid media. Compared to surface acoustic wave (SAW) devices, shear horizontal acoustic plate mode (SH-APM) devices are based on thin piezoelectric plates, so that a great number of stationary waves, or plate modes, can propagate. SH-APM devices present two main advantages. Firstly, they are able to work in a liquid medium without excessive acoustic loss. Secondly, they can work in an aggressive medium, by using the unmetallized quartz surface for detection. As temperature variation is a critical parameter, it is important to know the device behaviour with temperature. This was already achieved for SAW devices, and it has been done partially for SH-APM devices. In this paper, we propose to recall main theoretical results, and to use the model approach to study particular SH-APM devices, from a theoretical and an experimental point of view.

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