Extended Data Fig. 3: Electron energy-loss spectroscopy on a gold nanoprism.
From: Attosecond electron microscopy by free-electron homodyne detection
a, Electron energy-loss spectra taken in standard TEM mode at different positions on the sample showing different energies for different modes (centre, corner and edge). b, Maps at different energies show the spatial profile of different modes. c,d, Dark-field micrographs taken before and during the spectroscopy measurement.
