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Articles by Mette Gaarde
Super-resolution stimulated X-ray Raman spectroscopy - Nature
Abstract Propagation of intense X-ray pulses through dense media has led to the observation of phenomena such as atomic X-ray lasing1,2, self-induced transparency3 and stimulated X-ray Raman scattering (SXRS)4. SXRS has been long predicted as a means to launch and probe valence-electron wavepackets and as a building block for nonlinear X-ray spectroscopies5,6.
Going visible | Nature Photonics
Attosecond pulses in the optical regime, formed as solitons during infrared laser-pulse compression in a hollow-core fibre, may open up attosecond science in molecules and solids.
Bringing weak transitions to light - Nature Communications
Abstract Weak transitions between quantum states are of fundamental importance for a broad range of phenomena from analytical biochemistry to precision physics, but generally challenge experimental detection. Due to their small cross sections scaling with the absolute square of their transition matrix elements, spectroscopic measurements often fail in particular in the presence of competing background processes.
Characterizing Anomalous High-Harmonic Generation in Solids
Abstract Anomalous high-harmonic generation (HHG) arises in certain solids when irradiated by an intense laser field, originating from a Berry-curvature-induced perpendicular anomalous current. The observation of pure anomalous harmonics is, however, often prohibited by contamination from harmonics stemming from interband coherences.
Electrons Filming Themselves
February 21, 2023• Physics 16, 27 Two groups demonstrate innovative ways to capture the ultrafast motion of electrons in atoms and molecules. APS/Carin Cain; G. A. Stewart et al. [1] APS/Carin Cain; G. A. Stewart et al. [1] × Electrons move so quickly inside of atoms and molecules that they are challenging to “capture on film” without blurring the images.
Spatiotemporal filtering of high harmonics in solids
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