Time-resolved detection of propagating Lamb waves in thin silicon membranes with frequencies up to 197 GHz
| Type of Publication: | Journal article |
| URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-0-288114 |
| Author: | Grossmann, Martin; Ristow, Oliver; Hettich, Mike; He, Chuan; Waitz, Reimar; Scheer, Elke; Gusev, Vitalyi; Dekorsy, Thomas; Schubert, Martin |
| Year of publication: | 2015 |
| Published in: | Applied Physics Letters ; 106 (2015), 17. - 171904. - ISSN 0003-6951. - eISSN 1077-3118 |
| DOI (citable link): | https://dx.doi.org/10.1063/1.4919132 |
| Summary: |
Guided acoustic waves are generated in nanopatterned silicon membranes with aluminum gratings by optical excitation with a femtosecond laser. The spatial modulation of the photoacoustic excitation leads to Lamb waves with wavelengths determined by the grating period. The excited Lamb waves are optically detected for different grating periods and at distances up to several μm between pump and probe spot. The measured frequencies are compared to the theoretical dispersion relation for Lamb waves in thin silicon membranes. Compared to surface acoustic waves in bulk silicon twice higher frequencies for Lamb waves (197 GHz with a 100 nm grating) are generated in a membrane at equal grating periods.
|
| Subject (DDC): | 530 Physics |
| Keywords: | Diffraction Gratings, Surface acoustic Waves, acoustic sensing, dispersion relations, |
| Link to License: | Terms of use |
| Bibliography of Konstanz: | Yes |
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GROSSMANN, Martin, Oliver RISTOW, Mike HETTICH, Chuan HE, Reimar WAITZ, Elke SCHEER, Vitalyi GUSEV, Thomas DEKORSY, Martin SCHUBERT, 2015. Time-resolved detection of propagating Lamb waves in thin silicon membranes with frequencies up to 197 GHz. In: Applied Physics Letters. 106(17), 171904. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.4919132
@article{Grossmann2015Timer-30836, title={Time-resolved detection of propagating Lamb waves in thin silicon membranes with frequencies up to 197 GHz}, year={2015}, doi={10.1063/1.4919132}, number={17}, volume={106}, issn={0003-6951}, journal={Applied Physics Letters}, author={Grossmann, Martin and Ristow, Oliver and Hettich, Mike and He, Chuan and Waitz, Reimar and Scheer, Elke and Gusev, Vitalyi and Dekorsy, Thomas and Schubert, Martin}, note={Article Number: 171904} }
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