Detection of elastic modes in a solid-liquid-solid planar waveguide

作者：Ham Rodriguez C I; Manzanares Martinez J^*; Moctezuma Enriquez D; Manzanares Martinez B

来源：Applied Physics Letters, 2016, 109(6): 061904.

DOI：10.1063/1.4960976

In this work, we demonstrate that acoustic ultra-short pulses can be used to characterize multiple guided modes in a solid-liquid-solid planar waveguide via the determination of the time of flight (tau) using the Short Time Fourier Transform (STFT). To obtain experimentally tau, we introduce a time dependent ultra-short acoustic signal s(t) at one side of a finite waveguide and we perform the STFT of the outgoing acoustic signal s'(t) from the other side. We have found that this technique is able to discriminate the signature of multiple even and odd modes at the same experimental run. Published by AIP Publishing.

• 出版日期2016-8-8