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Nanosecond Photoemission near the Potential Barrier of a Schottky Emitter

Joshua L. Reynolds1, Yonatan Israel2, Adam J. Bowman1, Brannon B. Klopfer1, and Mark A. Kasevich1,2,*

  • 1Department of Applied Physics, Stanford University, Stanford, California 94305, USA
  • 2Department of Physics, Stanford University, Stanford, California 94305, USA

  • *kasevich@stanford.edu
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Phys. Rev. Applied 19, 014035 – Published 11 January, 2023

DOI: https://doi.org/10.1103/PhysRevApplied.19.014035

Abstract

Nanosecond electron pulses are appealing for ultrafast imaging and electron-gating applications, where tunable currents and narrow energy spreads are desirable. Here, we demonstrate photoemission from a Schottky emitter triggered by nanosecond laser pulses. Using photon energies optimally tuned to the emission potential barrier, we generate pulses containing over 105 electrons with energy spreads below 1 eV by means of a prompt single-photon photoemission process. These results are consistent with a theoretical model of laser-triggered electron emission and energetic broadening during propagation and can be widely implemented.

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Phys. Rev. Applied 19, 014035– Published 11 January, 2023
  • Received 6 September 2022
  • Revised 18 November 2022
  • Accepted 9 December 2022
Article part of CHORUS
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