Abstract
We investigate experimentally and by numerical simulation the interaction between ultrahigh frequency surface acoustic waves (SAW) and periodic microstructures. We use both one-dimensional (1D) phononic crystals consisting of copper lines embedded in silicon oxide and 2D phononic crystals consisting of air-filled holes etched as a square lattice in a silicon substrate. Experimental results obtained by ultrashort pulsed optical excitation and interferometric detection are compared to time-domain finite element (FEM) simulations of the propagating ultrahigh frequency SAW with frequency components up to ~1 GHz in these phononic crystals, allowing the investigation of SAW scattering and phononic band structure. Good agreement was obtained between simulation and experiment.
| Original language | English |
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| Pages | 1032-1035 |
| Number of pages | 4 |
| DOIs | |
| Publication status | Published - Sep 2009 |
| Event | 2009 IEEE Ultrasonics Symposium - Rome, Italy Duration: 20 Sep 2009 → 23 Sep 2009 |
Conference
| Conference | 2009 IEEE Ultrasonics Symposium |
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| Country | Italy |
| City | Rome |
| Period | 20/09/09 → 23/09/09 |
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Keywords
- ultrahigh frequency surface waves
- phononic crystals
- periodic microstructures
Cite this
Veres, I. A., Profunser, D. M., Wright, O. B., Matsuda, O., & Lang, U. (2009). Real-time simulations and experiments on ultrahigh frequency surface waves in micro-structured phononic crystals. 1032-1035 . Paper presented at 2009 IEEE Ultrasonics Symposium, Rome, Italy. https://doi.org/10.1109/ULTSYM.2009.5441862