A04 – Spatio-temporal correlations of electrons emitted from femtosecond laserdriven needle sources
Summary
Individual electrons emitted by needle tips can be spatially fully coherent, even if they are emitted with femtosecond laser pulses. We have shown this for single photon as well as multi-photon photoemission. Based on this property, we aim to perform correlation experiments with electrons, perfectly controlled in 4D. For example, we propose to investigate correlations due to classical Coulomb repulsion, but we also plan to disentangle them from quantum repulsion, i.e., repulsion based on the exchance interaction (Pauli blocking because of the Fermionic character of the electrons). This would represent the Hanbury Brown-Twiss experiment with electrons, here from a single needle tip, which is well known to be a high brightness electron emitter.
Project Leaders
Peter Hommelhoff
Friedrich-Alexander-Universität Erlangen-Nürnberg
91058 Erlangen
- Phone number: +49 9131 85-27090
- Email: peter.hommelhoff@fau.de
Publications
2023
- , , , , :
Strong-field electron emission from gold needle tips
In: Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics 41 (2023), Article No.: 052803
ISSN: 2166-2754
DOI: 10.1116/6.0002916 - , , , :
Optical measurement of the work function and the field reduction factor of metallic needle tips
In: Review of Scientific Instruments 94 (2023)
ISSN: 0034-6748
DOI: 10.1063/5.0165802 - , , :
Few-electron correlations after ultrafast photoemission from nanometric needle tips
In: Nature Physics (2023)
ISSN: 1745-2473
DOI: 10.1038/s41567-023-02059-7
2022
- , :
Coulomb Interactions and the Spatial Coherence of Femtosecond Nanometric Electron Pulses
In: ACS Photonics (2022)
ISSN: 2330-4022
DOI: 10.1021/acsphotonics.2c00839