Institute of Functional Interfaces

Dynamics of colloidal crystals studied by pump-probe experiments at FLASH

  • chair:

    Dronyak, R. / Gulden, J. / Yefanov, / O. M. / Singer, A. / Gorniak, T. / Senkbeil, T. / Meijer, J.-M. / Al-Shemmary, A. / Hallmann, J. / Mai, D. D. / Reusch, T. / Dzhigaev, D. / Kurta, R. P. / Lorenz, U. / Petukhov, A. V. / Duesterer, S. / Treusch, R. / Strikhanov, M. N. / Weckert, E. / Mancuso, A. P. / Salditt, T. / Rosenhahn, A. / Vartanyants, I. A. (2012)

  • place:

    Physical Review B 86

  • Date: 2012
  • Dronyak, R. / Gulden, J. / Yefanov, / O. M. / Singer, A. / Gorniak, T. / Senkbeil, T. / Meijer, J.-M. / Al-Shemmary, A. / Hallmann, J. / Mai, D. D. / Reusch, T. / Dzhigaev, D. / Kurta, R. P. / Lorenz, U. / Petukhov, A. V. / Duesterer, S. / Treusch, R. / Strikhanov, M. N. / Weckert, E. / Mancuso, A. P. / Salditt, T. / Rosenhahn, A. / Vartanyants, I. A. (2012): „Dynamics of colloidal crystals studied by pump-probe experiments at FLASH“. In: Physical Review B 86 (2012)

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.



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