Transient work function gating: A new photoemission regime

  title={Transient work function gating: A new photoemission regime},
  author={Sergio Carbajo},
  journal={arXiv: Applied Physics},
  • S. Carbajo
  • Published 2 June 2020
  • Physics
  • arXiv: Applied Physics
We present the theoretical basis for a new photoemission regime, transient work function gating (TWFG), that temporally and energetically gates photoemission and produces near-threshold photoelectrons with thermally limited emittance, percent-level quantum efficiency, and control over temporal coherence. The technique consists of actively gating the work function of a generalized photocathode using non-ionizing long-wavelength optical field to produce an adiabatic modulation of the carrier… 
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