Nanosecond Photoemission near the Potential Barrier of a Schottky Emitter

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 and use a dispersive magnetic prism array t...

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Bibliographic Details
Published in:arXiv.org 2023-01
Main Authors: Reynolds, Joshua L, Israel, Yonatan, Bowman, Adam J, Klopfer, Brannon B, Kasevich, Mark A
Format: Article
Language:English
Subjects:
Electron emission
Electron energy
Electron pulses
Emitters (electron)
Photoelectric emission
Photon emission
Photons
Online Access:Get full text
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Summary: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 and use a dispersive magnetic prism array to image the electron energy distributions. Using photon energies optimally tuned to the emission potential barrier, we generate pulses containing over 10\(^5\) electrons with energy spreads below 1 eV with a prompt, single-photon emission process. These results are consistent with theoretical models of laser-triggered electron emission and energetic broadening during propagation and can be widely implemented.
ISSN:2331-8422
DOI:10.48550/arxiv.2209.04478