Harnessing Plasmonic Interference for Nanoscale Ultrafast Electron Sources
Abstract
In this paper we demonstrate the use of plasmonic focusing in conjunction with non-linear photoemisison to develop geometrically flat nanoscale electron sources with less than 40 pm-rad root mean squared (rms) normalized transverse emittance. Circularly polarized light is incident on a gold Archimedean spiral structure to generate surface-plasmon-polaritons which interfere coherently at the center resulting in a 50 nm rms emisison area. Such a nanostructured flat surface enables simultaneous spatio-temporal confinement of emitted electrons at the nanometer and femtosecond level and can be used as an advanced electron source for high-repetition-rate ultrafast electron diffraction and microscopy experiments as well as next-generation of miniaturized particle accelerators.
Cite
@article{arxiv.2406.08678,
title = {Harnessing Plasmonic Interference for Nanoscale Ultrafast Electron Sources},
author = {Alimohammed Kachwala and Mansoure Moeini Rizi and Christopher M Pierce and Daniele Filippetto and Jared Maxson and Siddharth Karkare},
journal= {arXiv preprint arXiv:2406.08678},
year = {2024}
}