Imaging surface-acoustic fields in a longitudinal leaky wave resonator

Holmgren, O.; Knuuttila, J. V.; Makkonen, T.; Kokkonen, K.; Plessky, V. P.; Steichen, W.; Solal, M.; Salomaa, M. M.
January 2005
Applied Physics Letters;1/10/2005, Vol. 86 Issue 2, p024101
Academic Journal
Acoustic wave fields in a surface-acoustic-wave resonator employing the longitudinal leaky wave mode have been imaged using a scanning Michelson laser interferometer. The synchronous one-port resonator is fabricated on YZ-cut lithium niobate. The vibration amplitude component perpendicular to the surface has been measured at several frequencies around the fundamental-mode resonance frequency of 1.54 GHz and around the Rayleigh-wave resonance frequency of 0.82 GHz. The longitudinal beating pattern, typically observed in the resonators utilizing Rayleigh waves, is not observed in the longitudinal leaky surface acoustic-wave resonator within the measured frequency range.


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