By setting a combination of advanced ultrafast optical approaches, SPINUP has for final objective the direct visualization and understanding of dynamical characteristics of sub-picosecond spincurrent pulses propagation at the nanoscale. The main methodology will be based on the direct spatially- (smaller than 30 nm) and time-resolved (shorter than 50 fs) measurements of pure spincurrents using advanced near-field non-linear optical microscopy and spectroscopy. Eventually, SPINUP would allow me to settle a novel field of expertise at CEA/SPEC, focused on time-resolved near-field optics to study the new trends of ultrafast magnetism. The scientific impact expected from this ANR JCJC “SPINUP” will be of utmost importance for the next generation of ultrafast spintronics devices and in a more general framework, for ultrafast nanoscience.