Fast Spectroscopic Imaging Using Extreme Ultraviolet Interferometry

High-harmonic generation (HHG) is a unique light source for extreme ultraviolet (EUV) light, since it combines excellent spatial coherence with an ultrabroad spectrum and ultrashort pulse duration. This makes HHG a highly attractive platform for methods ranging from nanoscale coherent diffractive imaging to time-resolved spectroscopy. Importantly, HHG-based EUV spectroscopy enables both attosecond time-resolution and element-specificity, which makes it possible to disentangle correlated electronic, structural and magnetic dynamics in con-densed matter (e.g., [1]). As a consequence, HHG-based methods that combine nanoscale spatial resolution with EUV spectroscopy are highly sought-after. However, the aim for spatio-spectro-temporal data places a significant, often insurmountable, requirement on the data acquisition and analysis.