Observation of sagittal X-ray diffraction by surface acoustic waves in Bragg geometry
- X-ray Bragg diffraction in sagittal geometry on a Y-cut langasite crystal (La3Ga5SiO14) modulated by Lambda = 3 mu m Rayleigh surface acoustic waves was studied at the BESSY II synchrotron radiation facility. Owing to the crystal lattice modulation by the surface acoustic wave diffraction, satellites appear. Their intensity and angular separation depend on the amplitude and wavelength of the ultrasonic superlattice. Experimental results are compared with the corresponding theoretical model that exploits the kinematical diffraction theory. This experiment shows that the propagation of the surface acoustic waves creates a dynamical diffraction grating on the crystal surface, and this can be used for space-time modulation of an X-ray beam.
Author details: | Simone Vadilonga, Ivo ZizakORCiD, Dmitry Roshchupkin, Emelin Evgenii, Andrei Petsiuk, Wolfram LeitenbergerGND, Alexei Erko |
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DOI: | https://doi.org/10.1107/S1600576717002977 |
ISSN: | 1600-5767 |
Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/28381976 |
Title of parent work (English): | Journal of applied crystallography |
Publisher: | International Union of Crystallography |
Place of publishing: | Chester |
Publication type: | Article |
Language: | English |
Year of first publication: | 2017 |
Publication year: | 2017 |
Release date: | 2020/04/20 |
Tag: | optics; sagittal X-ray diffraction; surface acoustic waves; synchrotron radiation |
Volume: | 50 |
Number of pages: | 6 |
First page: | 525 |
Last Page: | 530 |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
Peer review: | Referiert |