Physics.

In this work we report a systematic investigation of polymer overlayer thickness in a Love wave device working at a fundamental frequency of 110MHz and at the 330MHz harmonic. At both frequencies we observe the initial reduction in insertion loss associated with a Love wave device. Significantly, we also observe a series of resonant conditions as the layer thickness is further increased. The separation of these resonances is attributed to an increase in thickness of half of the acoustic wavelength in the polymer. PACS: 43.35 2 A Love wave is a type of shear horizontally polarized surface acoustic wave that can be produced in a surface skimming bulk wave (SSBW) device when an overlayer with an acoustic shear velocity less than that in the bulk is deposited over the propagation path [1]. The overlayer acts as a guiding layer producing a reduction in the insertion loss compared to that of an uncoated SSBW device