Magnetic Control of Bound Electron Spins with Cavity-bunched Electron Beams

Advances in longitudinally structured electron beams have offered a new mode of materials investigation through merging the advantages of a spatial resolution of an energetic electron beam with the temporal resolution and spectral resolutions achievable by mode-locked lasers. Theoretical investigations on the interaction between a bound electron and a longitudinally bunched electron beam suggests that a properly structured beam may resonantly excite a bound electron, but the spatial extent of such an interaction remains unclear. We experimentally investigate the interaction between a longitudinally structured electron beam via cavity-based microbunching and report on its interaction with the bound electron spin in a diamond nitrogen vacancy center.