Terahertz Field Emission of Femto-Coulomb Electron Bunches

Matte, Dominique; Gingras, Lauren; Sutton, M.; Siwick, Bradley J.; Cooke, David G.

doi:10.1109/irmmw-thz.2018.8509839

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…50 Li and Jones used intense THz pulses to show acceleration of field-emitted electrons up to 5 keV, 51 and the Cooke team has demonstrated THz-driven field emission of more than 10 5 electrons per THz pulse incident on a nanotip, and subsequent acceleration by the THz field to 1.8keV. 52 The role of the optical field in acceleration of electrons emitted from nanoparticles with plasmonic field enhancement has been discussed by the Hohenester 53 and Schönhense 54 groups, and THz-driven acceleration of femtosecond electron bunches generated by photoemission with applications in compact accelerators has been investigated extensively by the Kärtner team. 55,56 In all the work mentioned above, researchers have made use of nanoscale structures to investigate field-driven electron emission.…”

Section: Important Tunneling Phenomenamentioning

confidence: 99%

Ultrafast THz-driven electron emission from metal metasurfaces

Lange

Noori

Kristensen

et al. 2020

Journal of Applied Physics

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Field-driven emission of electrons from metals is a technology that has had a large impact on science and society over the past century, for instance, in early and contemporary vacuum tube electronics, cathode ray displays, and high-power microwave and sub-millimeter electronics. In this Perspective article, we discuss the role of field-driven electron emission in the broader context of tunneling phenomena, and we discuss some aspects of the physics behind field emission. We focus on the use of ultrafast single-cycle transients of electromagnetic radiation in the terahertz (THz) frequency range to drive the electron emission process. With electric fields of such short duration, it becomes possible to generate electron bursts of sub-picosecond duration controllable on the sub-cycle time scale due to the large nonlinearity of the emission process. We review the recent literature on THz-driven field emission and then finally present selected experiments from our own laboratories to emphasize aspects such as design of the emitter structure with respect to optimal field enhancement properties, measurement of the electron bunch duration, visualization of the spatial emission pattern of emitted electrons, and material damage caused by the electrons.

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