Projects per year
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 |
Keywords
- ultrahigh frequency surface waves
- phononic crystals
- periodic microstructures
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Projects
- 1 Finished
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Ultrasonic Measurement and Beamforming using Optical Sensors
Pierce, G., Culshaw, B., Hayward, G., Stewart, G. & Thursby, G.
EPSRC (Engineering and Physical Sciences Research Council)
1/01/08 → 31/10/11
Project: Research