Layer-guided shear acoustic plate mode sensor

Newton, M. I.; McHale, G.; Martin, F.
March 2003
Applied Physics Letters;3/31/2003, Vol. 82 Issue 13, p2181
Academic Journal
Experimental data are presented for an acoustic wave sensor based on a layer-guided shear acoustic plate mode excited on a thin quartz substrate. The effect of coating the front and back faces with polymer waveguiding layers is shown to convert the plate modes into layer-guided plate modes in a manner analogous to Love waves and to produce a similar enhancement of mass sensitivity. These layer-guided plate mode devices offer the possibility of liquid-phase sensing with transducers situated on the face of the substrate isolated from the liquid, while offering a mass sensitivity comparable to a Love wave device.


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