Laser control of electron matter waves

Jones, Eric; Becker, Maria; Luiten, O.J.; Batelaan, Herman

doi:10.1002/lpor.201500232

Cited by 28 publications

(28 citation statements)

References 129 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The degeneracy  is defined as the number of electrons in the coherence volume [5]. The product of the number of emitted electrons n per volume V and the coherence volume c V gives the number of electrons in the coherence volume as…”

Section: P T T Tr T T T T T T T T T T T T Dt Dt T T T T T T T T Dt Dtmentioning

confidence: 99%

Partially coherent quantum degenerate electron matter waves

Keramati

Jones

Armstrong

et al. 2020

Advances in Imaging and Electron Physics

Self Cite

View full text Add to dashboard Cite

The use of electron beams is ubiquitous; electron microscopy, scanning tunneling microscopy, electron lithography, and electron diffractometry all use well-collimated and focused beams. On the other hand, quantum degenerate electron beams do currently not exist. The realization of such beams may impact all electron beam technologies and are interesting to pursue. Past attempts to reach degeneracy were hampered by the low degeneracy of continuously emitting electron sources. With the recent advent of ultra-short electron pulses, high degeneracy is expected. Coulomb repulsion and low quantum coherence are hurdles that need to be overcome. A quantum analysis of the electron degeneracy for partially coherent pulsed electron sources is presented and two-particle coincidence spectra are obtained for source parameters that are currently available. The conclusive demonstration of the fermionic Hanbury Brown-Twiss (HBT) effect for free electrons is shown to be within reach, and our results support the claim that femto-second nanotip electron sources, both polarized and unpolarized, can manifest partial to complete quantum degeneracy with appreciable signal-to-noise-ratios for free electron pulses notwithstanding their small particle numbers.

show abstract

Section: P T T Tr T T T T T T T T T T T T Dt Dt T T T T T T T T Dt Dtmentioning

confidence: 99%

Partially coherent quantum degenerate electron matter waves

Keramati

Jones

Armstrong

et al. 2020

Advances in Imaging and Electron Physics

Self Cite

View full text Add to dashboard Cite

show abstract

“…Electron-light interactions have been proposed as an alternative approach to coherent electron manipulation in free space 9 . Here, we demonstrate a phase plate for TEM based on the electron phase shift in the ponderomotive potential of a standing laser wave resonantly enhanced in an optical cavity 10,11 .…”

Section: Introductionmentioning

confidence: 99%

Laser phase plate for transmission electron microscopy

et al. 2019

View full text Add to dashboard Cite

Transmission electron microscopy (TEM) of rapidly frozen biological specimens, or cryo-EM, would benefit from the development of a phase plate for in-focus phase contrast imaging. Several types of phase plates have been investigated, but rapid electrostatic charging of all such devices has hindered these efforts. Here, we demonstrate electron phase manipulation with a high-intensity continuous-wave laser beam, and utilize it as a phase plate for TEM. We demonstrate the laser phase plate by imaging an amorphous carbon film. The laser phase plate provides a stable and tunable phase shift without charging or unwanted electron scattering. These results suggest the possibility for dose-efficient imaging of unstained biological macromolecules and cells.

show abstract

“…Controlling free-space electron propagation with lasers offers an alternative approach to electron optics [9]. Ultrafast TEM relies on laser pulses to produce femtosecond electron bursts [10,11].…”

Section: Introductionmentioning

confidence: 99%

Near-concentric Fabry-Pérot cavity for continuous-wave laser control of electron waves

Schwartz¹,

Axelrod²,

Tuthill³

et al. 2017

Opt. Express

View full text Add to dashboard Cite

Manipulating free-space electron wave functions with laser fields can bring about new electron-optical elements for transmission electron microscopy (TEM). In particular, a Zernike phase plate would enable high-contrast TEM imaging of soft matter, leading to new opportunities in structural biology and materials science. A Zernike phase plate can be implemented using a tight, intense continuous laser focus that shifts the phase of the electron wave by the ponderomotive potential. Here, we use a near-concentric cavity to focus 7.5 kW of continuous-wave circulating laser power at 1064 nm into a 7 µm mode waist, achieving a record continuous laser intensity of 40 GW/cm. Such parameters are sufficient to impart a phase shift of 1 rad to a 10 keV electron beam, or 0.16 rad to a 300 keV beam. Our numerical simulations confirm that the standing-wave phase shift profile imprinted on the electron wave by the intra-cavity field can serve as a nearly ideal Zernike phase plate.

show abstract

Laser control of electron matter waves

Cited by 28 publications

References 129 publications

Partially coherent quantum degenerate electron matter waves

Partially coherent quantum degenerate electron matter waves

Laser phase plate for transmission electron microscopy

Near-concentric Fabry-Pérot cavity for continuous-wave laser control of electron waves

Contact Info

Product

Resources

About