TY  - JOUR
A1  - Enquist, Henrik
A1  - Navirian, Hengameh
A1  - Nueske, Ralf
A1  - von Korff Schmising, Clemens
A1  - Jurgilaitis, Andrius
A1  - Herzog, Marc
A1  - Bargheer, Matias
A1  - Sondhauss, Peter
A1  - Larsson, Joergen
T1  - Subpicosecond hard x-ray streak camera using single-photon counting
N2  - We have developed and characterized a hard x-ray accumulating streak camera that achieves subpicosecond time resolution by using single-photon counting. A high repetition rate of 2 kHz was achieved by use of a readout camera with built-in image processing capabilities. The effects of sweep jitter were removed by using a UV timing reference. The use of single-photon counting allows the camera to reach a high quantum efficiency by not limiting the divergence of the photoelectrons.
Y1  - 2010
UR  - http://www.opticsinfobase.org/
U6  - https://doi.org/10.1364/OL.35.003219
SN  - 0146-9592
ER  - 
TY  - JOUR
A1  - Herzog, Marc
A1  - Leitenberger, Wolfram
A1  - Shayduk, Roman
A1  - van der Veen, Renske Marjan
A1  - Milne, Chris J.
A1  - Johnson, Steven Lee
A1  - Vrejoiu, Ionela
A1  - Alexe, Marin
A1  - Hesse, Dietrich
A1  - Bargheer, Matias
T1  - Ultrafast manipulation of hard x-rays by efficient Bragg switches
N2  - 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 (Delta R/R-0=-0.91), while the (0 0 118) reflection increases by more than an order of magnitude (Delta R/R-0=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 Delta R/R-0 of 700 with high reflectivity.
Y1  - 2010
UR  - http://apl.aip.org/
U6  - https://doi.org/10.1063/1.3402773
SN  - 0003-6951
ER  -