期刊
PHYSICAL REVIEW APPLIED
卷 19, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevApplied.19.014035
关键词
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In this study, photoemission from a Schottky emitter triggered by nanosecond laser pulses is demonstrated. By using photon energies optimally tuned to the emission potential barrier, pulses containing over 105 electrons with energy spreads below 1 eV are generated through a single-photon photoemission process. These results can have widespread implementation and are consistent with a theoretical model of laser-triggered electron emission and energetic broadening during propagation.
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 emis-sion 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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