Free-Space Optical Modulation of Free Electrons in the Continuous-Wave Regime
arXiv:2412.03410 · doi:10.1103/PhysRevLett.134.123804
Abstract
The coherent interaction between free electrons and optical fields can produce free-electron compression and push the temporal resolution of ultrafast electron microscopy to the attosecond regime. However, a large electron-light interaction is required to attain a strong compression, generally necessitating short light and electron pulses combined with optical scattering at nanostructures. Here, we theoretically investigate an alternative configuration based on stimulated Compton scattering, whereby two counterpropagating Gaussian light beams induce energy jumps in a colinear electron beam by multiples of their photon-energy difference. Strong recoil effects are produced by extending the electron-light interaction over millimetric distances, enabling a dramatic increase in temporal compression and substantially reshaping the electron spectra for affordable laser powers. Beyond its fundamental interest, our work introduces a practical scheme to achieve a large temporal compression of continuous electron beams without involving optical scattering by material structures.
11 pages, 9 figures, 36 references
References in corpus (11)
- Ponderomotive generation and detection of attosecond free-electron pulse trains
- Cavity-mediated electron-photon pairs
- Inelastic ponderomotive scattering of electrons at a high-intensity optical travelling wave in vacuum
- Optical Modulation of Electron Beams in Free Space
- Design of an electron microscope phase plate using a focused continuous-wave laser
- Attosecond electron microscopy by free-electron homodyne detection
- Transverse Electron Beam Shaping with Light
- Coherently amplified ultrafast imaging using a free-electron interferometer
- Quantum state heralding using photonic integrated circuits with free electrons
- Spatiotemporal Electron-Beam Focusing through Parallel Interactions with Shaped Optical Fields
- Inelastic Electron Scattering at a Single-Beam Structured Light Wave