论文标题
纳秒光发射附近的肖特基发射极壁垒附近
Nanosecond Photoemission near the Potential Barrier of a Schottky Emitter
论文作者
论文摘要
纳秒电子脉冲吸引了超快成像和电子门控应用，在这种应用中，可调电流和狭窄的能量扩展是可取的。在这里，我们证明了来自纳秒激光脉冲触发的Schottky发射极的光发射，并使用色散磁性棱镜阵列来对电子能量分布进行成像。使用最佳调节发射电势屏障的光子能，我们生成的脉冲包含超过10 $^5 $的电子，能量散布以下1 eV以下，并具有迅速的单光子发射过程。这些结果与激光触发的电子发射和传播过程中的能量扩张的理论模型一致，并且可以广泛实施。
Nanosecond electron pulses are appealing for ultrafast imaging and electron gating applications, where tunable currents and narrow energy spreads are desirable. Here, we demonstrate photoemission from a Schottky emitter triggered by nanosecond laser pulses and use a dispersive magnetic prism array to image the electron energy distributions. Using photon energies optimally tuned to the emission potential barrier, we generate pulses containing over 10$^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.
