Dynamics of colloidal crystals studied by pump-probe experiments at FLASH
Materials Science
2013-01-30 v1
Abstract
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.
Cite
@article{arxiv.1206.1097,
title = {Dynamics of colloidal crystals studied by pump-probe experiments at FLASH},
author = {R. Dronyak and J. Gulden and O. M. Yefanov and A. Singer and T. Gorniak and T. Senkbeil and J. -M. Meijer and A. Al-Shemmary and J. Hallmann and D. D. Mai and T. Reusch and D. Dzhigaev and R. P. Kurta and U. Lorenz and A. V. Petukhov and S. Duesterer and R. Treusch and M. N. Strikhanov and E. Weckert and A. P. Mancuso and T. Salditt and A. Rosenhahn and I. A. Vartanyants},
journal= {arXiv preprint arXiv:1206.1097},
year = {2013}
}
Comments
12 pages, 3 figures