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High performance Brillouin microscopy has been used in order to directly measure the propagation losses of surface acoustic wave in Langasite substrate. The interdigital transducers (IDTs) were designed to generate several harmonics leading to induce acoustic waves with different wavelengths. The induced phonons were detected and characterized at different frequencies and at different distance from...
The study of the effect of the deposition temperature on the surface acoustic wave (SAW) propagation velocity of aluminum nitride (AlN) films has been made using Brillouin spectroscopy. The AlN films were deposited using magnetron sputtering technique. Acoustical and structural characterizations of the thin films were made to point out the effect of deposition temperature on acoustical properties...
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