27. 05. 2025
Optical correction of chromatic aberration of electron lenses published in PRL
Electron optics uses a curved electrostatic or magnetic field to focus electrons accelerated to high energy. Electron lenses are the basic building blocks of microscopes, which today allow us to distinguish individual atoms in matter. However, these lenses, like optical lenses, exhibit imaging aberrations. One of them is the so-called chromatic aberration, which causes electrons with slightly different energies to focus at different distances, which worsens the spatial resolution of microscopes. In an article published in the journal Physical Review Letters, we show that in the case of pulsed electron beams, this aberration can be removed by illuminating the electrons with a shaped laser light.
