Ultrafast manipulation of hard x-rays by efficient Bragg switches

M. Herzog, W. Leitenberger, R. Shayduk, R. M. Van Der Veen, C. J. Milne, S. L. Johnson, I. Vrejoiu, M. Alexe, D. Hesse, M. Bargheer

Research output: Contribution to journalArticle

Abstract

We experimentally demonstrate efficient switching of the hard x-ray Bragg reflectivity of a SrRuO3 / SrTiO3 superlattice by optical excitation of large-amplitude coherent acoustic superlattice phonons. The rocking curve changes drastically on a 1 ps timescale. The (0 0 116) reflection is almost extinguished (δR/R0 =-0.91), while the (0 0 118) reflection increases by more than an order of magnitude (δR/ R0 =24.1). The change of the x-ray structure factor depends nonlinearly on the phonon amplitude, allowing manipulation of the x-ray response on a timescale considerably shorter than the phonon period. Numerical simulations for a superlattice with slightly changed geometry and realistic parameters predict a switching-contrast ratio δR/R0 of 700 with high reflectivity.

Original languageEnglish (US)
Article number161906
JournalApplied Physics Letters
Volume96
Issue number16
DOIs
StatePublished - Apr 19 2010
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Herzog, M., Leitenberger, W., Shayduk, R., Van Der Veen, R. M., Milne, C. J., Johnson, S. L., Vrejoiu, I., Alexe, M., Hesse, D., & Bargheer, M. (2010). Ultrafast manipulation of hard x-rays by efficient Bragg switches. Applied Physics Letters, 96(16), [161906]. https://doi.org/10.1063/1.3402773