| Autor: |
Grünsteidl, Clemens, Veres, István, Berer, Thomas, Kreuzer, Susanne, Rothemund, Ralph, Hettich, Mike, Scherleitner, Edgar, Ryzy, Martin |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 10/19/2020, Vol. 117 Issue 16, p1-5, 5p |
| Abstrakt: |
We present an evaluation of attenuation of elastic waves in the GHz range, based on the decay of thickness-stretch resonances of plates. We measured the elastic response of micro-scale aluminum plates, using a laser-ultrasound technique. The thermo-elastic laser excitation provides significant coupling into thickness-stretch modes in the frequency range above 1.5 GHz. To suppress interference from other resonant and transient modes, we used an excitation spot size well above the plate thickness and applied signal processing in the time and frequency domain. We adapted existing theory on the decay of thickness-shear modes to apply for thickness-stretch modes, validated the derived theory with simulations, and applied it to experiments. A set of samples with different thicknesses in the range of 1.1–2.15 μm allowed us to obtain damping values in the corresponding frequency range of 1.5–3 GHz. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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