Interference between quantum paths in coherent Kapitza–Dirac effect

  title={Interference between quantum paths in coherent Kapitza–Dirac effect},
  author={Nahid Talebi and Christoph Lienau},
  journal={New Journal of Physics},
In the Kapitza–Dirac effect, atoms, molecules, or swift electrons are diffracted off a standing wave grating of the light intensity created by two counter-propagating laser fields. In ultrafast electron optics, such a coherent beam splitter offers interesting perspectives for ultrafast beam shaping. Here, we study, both analytically and numerically, the effect of the inclination angle between two laser fields on the diffraction of pulsed, low-energy electron beams. For sufficiently high light… 

Figures from this paper

Quantum Coherent Control of Slow Electron Wave Packets with Light

    N. TalebiC. Lienau
    2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
  • 2019
Interaction of a moving electron wave packet in free space with light and nanostructures have taken much attention recently, by the emergence of photon-induced near-field electron microscopy [1–2].

Optical manipulation of matter waves.

Light is used to steer the motion of atoms in free space, enabling cooling and trapping of matter waves through ponderomotive forces and Doppler-mediated photon scattering. Likewise, light

Strong Interaction of Slow Electrons with Near-Field Light Visited from First Principles.

This work systematically investigates electron-light interactions from first principles and shows that enhanced coupling can be achieved for systems involving slow electron wave packets interacting with plasmonic nanoparticles, due to simultaneous classical recoil and quantum mechanical photon absorption and emission processes.

Inelastic Electron Scattering at a Single-Beam Structured Light Wave

− In this work we demonstrate the inelastic scattering of slow-electron wavepackets at a propagating Hermite-Gaussian light beam. The pulsed Hermite-Gaussian beam thereby forms a pondermotive

Optical Excitations with Electron Beams: Challenges and Opportunities

Free electron beams such as those employed in electron microscopes have evolved into powerful tools to investigate photonic nanostructures with an unrivaled combination of spatial and spectral

Controlling two-photon emission from superluminal and accelerating index perturbations

Sources of photons with controllable quantum properties such as entanglement and squeezing are desired for applications in quantum information, metrology and sensing. However, fine-grained control

Controlling two-photon emission from superluminal and accelerating index perturbations

Sources of photons with controllable quantum properties such as entanglement and squeezing are desired for applications in quantum information, metrology and sensing. However, fine-grained control

Spatio-temporal shaping of a free-electron wave function via coherent light–electron interaction

The past decade has witnessed a quantum revolution in the field of computation, communication and materials investigation. A similar revolution is also occurring for free-electron based techniques,

Electron-Light Interactions Beyond Adiabatic Approximation

    N. Talebi
    Near-Field-Mediated Photon–Electron Interactions
  • 2019
Aligned with the technological developments of electron-based characterization techniques, our theoretical frameworks are yet to be adapted to the strong-laser and slow-electron regimes. More

Tailoring near-field-mediated photon electron interactions with light polarization

Inelastic interaction of free-electrons with optical near fields has recently attracted attention for manipulating and shaping free-electron wavepackets. Understanding the nature and the dependence

Inelastic ponderomotive scattering of electrons at a high-intensity optical travelling wave in vacuum

Electrons are diffracted by a standing light wave of light, a phenomenon known as the Kapitza–Dirac effect. A generalization of this effect opens perspectives for the manipulation of ultrashort

The Kapitza-Dirac effect

The Kapitza-Dirac effect is the diffraction of a well-collimated particle beam by a standing wave of light. Why is this interesting? Comparing this situation to the introductory physics textbook

Schrödinger electrons interacting with optical gratings: quantum mechanical study of the inverse Smith–Purcell effect

Slow swift electrons with low self-inertia interact differently with matter and light in comparison with their relativistic counterparts: they are easily recoiled, reflected, and also diffracted form

Ramsey-type phase control of free-electron beams

Using a technique inspired by Ramsey spectroscopy it is now possible to coherently control free electrons in an electron microscope. Quantum coherent evolution, interference between multiple distinct

Interaction of electron beams with optical nanostructures and metamaterials: from coherent photon sources towards shaping the wave function

Investigating the interaction of electron beams with materials and light has been a field of research for more than a century. The field was advanced theoretically by the rise of quantum mechanics

Electron diffraction by plasmon waves

The properties of an electron beam can be manipulated by electromagnetic fields in vacuum via the ponderomotive force. Such an interaction is also at the core of the Kapitza-Dirac effect, which

Quantum coherent optical phase modulation in an ultrafast transmission electron microscope

The results reveal the potential of quantum control for the precision structuring of electron densities, with possible applications ranging from ultrafast electron spectroscopy and microscopy to accelerator science and free-electron lasers.

The reflection of electrons from standing light waves

Experiments are described in which a slow electron beam is deflected by a standing light wave produced by a high intensity laser. This interaction is believed to occur as a Bragg reflection of the

Electron-light interactions beyond the adiabatic approximation: recoil engineering and spectral interferometry

ABSTRACT The adiabatic approximation has formed the basis for much of our understandings of the interaction of light and electrons. The classical nonrecoil approximation or quantum mechanical Wolkow

Ultrafast generation and control of an electron vortex beam via chiral plasmonic near fields

Femtosecond chiral plasmonic near fields enable the generation and dynamic control on the ultrafast timescale of an electron vortex beam and the vortex structure of the resulting electron wavepacket is probed in both real and reciprocal space using ultrafast transmission electron microscopy.