Dynamics of colloidal crystals studied by pump-probe experiments at FLASH
| Autor: | R. Dronyak, J. Gulden, O. M. Yefanov, A. Singer, T. Gorniak, T. Senkbeil, J.-M. Meijer, A. Al-Shemmary, J. Hallmann, D. D. Mai, T. Reusch, D. Dzhigaev, R. P. Kurta, U. Lorenz, A. V. Petukhov, S. Düsterer, R. Treusch, M. N. Strikhanov, E. Weckert, A. P. Mancuso, T. Salditt, A. Rosenhahn, I. A. Vartanyants |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Diffraction
Materials science Infrared FOS: Physical sciences Physics::Optics 02 engineering and technology 01 natural sciences 7. Clean energy Molecular physics symbols.namesake Optics 0103 physical sciences ddc:530 010306 general physics Condensed Matter - Materials Science business.industry Resolution (electron density) Materials Science (cond-mat.mtrl-sci) Colloidal crystal 021001 nanoscience & nanotechnology Condensed Matter Physics Electronic Optical and Magnetic Materials Wavelength Fourier analysis Picosecond symbols 0210 nano-technology business Ultrashort pulse |
| Zdroj: | Physical review. B, Condensed matter and materials physics, 86, 1. American Physical Society Physical review / B 86(6), 064303 (2012). doi:10.1103/PhysRevB.86.064303 |
| ISSN: | 1098-0121 |
| Popis: | We present a time-resolved infrared (IR) pump and extreme-ultraviolet (XUV) probe diffraction experiment to investigate ultrafast structural dynamics in colloidal crystals with picosecond resolution. The experiment was performed at the FLASH facility at DESY with a fundamental wavelength of 8 nm. In our experiment, the temporal changes of Bragg peaks were analyzed and their frequency components were calculated using Fourier analysis. Periodic modulations in the colloidal crystal were localized at a frequency of about 4-5 GHz. Based on the Lamb theory, theoretical calculations of vibrations of the isotropic elastic polystyrene spheres of 400 nm in size reveal a 5.07 GHz eigenfrequency of the ground (breathing) mode. 12 pages, 3 figures |
| Databáze: | OpenAIRE |
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