Investigation of crossed SAW fields by scanning acoustic force microscopy

We used multimode scanning acoustic force microscopy (SAFM) for studying noncollinearly propagating Rayleigh and Love wave fields. By analyzing torsion and bending movement of SAFM cantilever, normal and in-plane wave oscillation components are accessible. The SAFM principle is the down-conversion o...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2001-07, Vol.48 (4), p.1132-1138
Main Authors: Behme, G., Hesjedal, T.
Format: Article
Language:English
Subjects:
Acoustic measurements
Acoustic microscopy
Acoustic pulses
Acoustic waves
Acoustical measurements and instrumentation
Acoustics
Atomic force microscopy
Exact sciences and technology
Frequency
Fundamental areas of phenomenology (including applications)
Gallium arsenide
Gallium arsenides
Love waves
Microscopy
Oscillations
Phase measurement
Physics
RF signals
Scanning
Springs
Surface acoustic waves
Velocity measurement
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Summary:We used multimode scanning acoustic force microscopy (SAFM) for studying noncollinearly propagating Rayleigh and Love wave fields. By analyzing torsion and bending movement of SAFM cantilever, normal and in-plane wave oscillation components are accessible. The SAFM principle is the down-conversion of surface oscillations into cantilever vibrations caused by the nonlinearity of the tip-sample interaction. Through mixing of complementary oscillation components, phase velocities of crossed Rayleigh waves on GaAs and crossed Rayleigh and Love waves on the layered system SiO/sub 2//ST-cut quartz were obtained simultaneously. Now, it is possible to investigate the elastic properties of submicron areas through multimode SAFM measurements. Finally, we present mixing experiments of four SAWs on GaAs and discuss the various influences on the measured SAFM amplitude and phase contrast.
ISSN:0885-3010
1525-8955
DOI:10.1109/58.935732