order diffraction intensity (IMAGE)
Caption
Figure 1 a) First and b) second order diffraction intensity as a function of the time delay between the pump and probe beams. c) Intensity ratio between the second and first diffraction order (R21) as a function of excitation fluence at a delay of 50 ps. At a fluence of 1.3 arb.u., the transient magnetization grating starts to change its shape leading to the emergence of the second diffraction order, a fingerprint for AOS. d) The ratio R21 for a high excitation fluence (red circles) exhibits a large and constant ratio, which we identify as the emergence of a stable magnetic structures and therefore as additional evidence for AOS on the nanometer spatial scale.
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MBI/ACS
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