On interference effects in the elastodynamic Green’s functions G33(x,ω) of Si and GaAs

Pluta, M.; Every, A. G.; Grill, Wolfgang

doi:10.1016/j.ultras.2006.05.036

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Acoustic Waves In Piezoelectric Media1

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2006

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“…From the slowness surfaces the respective group velocities are derived by calculating the gradient (for details see for example 16 …”

Section: Acoustic Waves In Piezoelectric Mediamentioning

confidence: 99%

Acoustic holography of piezoelectric materials by Coulomb excitation

et al. 2006

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Electric surface excitation of ultrasound in the Coulomb field of scanned electrically conductive spherical local probes and similar detection has been employed for imaging of the transport properties of acoustic waves in piezoelectric materials including singlecrystalline wafers. The employed Coulomb scheme leads to a fully predictable and almost ideal point excitation and detection. In combination with two-channel quadrature transient detection it allows high precision spatially and temporally resolved holographic imaging. Via modeling of the excitation and propagation properties, the effective elastic tensor and the piezoelectric properties of the observed materials can be determined with high resolution from a single measurement. The generation and detection scheme as well as the theoretical background are demonstrated and applications are exemplified.

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“…From the slowness surfaces the respective group velocities are derived by calculating the gradient (for details see for example 16 …”

Section: Acoustic Waves In Piezoelectric Mediamentioning

confidence: 99%