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Reconstructing longitudinal strain pulses using time-resolved x-ray diffraction
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DOI：10.1103/PhysRevB.88.014302.png)
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Abstract
En 中文
Time-resolved x-ray diffraction is a very powerful tool for visualizing transient one-dimensional crystalline strains, ranging from crystal growth to shock wave production. In this work, we use picosecond x-ray diffraction to visualize transient strain formation from nanometer-scaled laser-excited gold films into crystalline substrates. We show that there is a direct correspondence between the measured time-resolved x-ray diffraction pattern and the transient acoustic wave, providing a straightforward method to make a reconstruction of the transient strain. In addition, we discuss real-world experimental constraints that place limits on the validity of the reconstructed transient acoustic wave.
Keywords:
DYNAMICAL THEORY
GENERATION
PROPAGATION
CRYSTAL
PHONONS
SYNCHROTRON
PROTEIN
GOLD
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