(a): Experimental set-up for the study of laser stimulated EELS and EEGS using a fast detection scheme; (b): EELS spectral-imaging with 900 ms ON time. In this configuration, the sample is illuminated, but most of the detected electrons do not undergo any sEELS/sEEGS event. Inset: HAADF image of the structure (coloured squares indicate the position of the beam where the colour-coordinated spectra in the main panel have been acquired) and filtered images for two main modes. (c): sEELS/sEEGS spectral-imaging with shorter ON time. Specifically, the ON time is close to the laser pulse duration, leading to a clear observation of sEELS/sEEGS features. Inset: HAADF image of the structure (coloured squares indicate the position of the beam where the colour-coordinated spectra in the main panel have been acquired) and filtered images around the energies of the sEELS/sEEGS first peak (courtesy Y. Auad et al. [171]).