论文标题
瞬态工作功能门控：一种新的光发射制度
Transient Work Function Gating: A New Photoemission Regime
论文作者
论文摘要
我们介绍了新的光发射制度，瞬态工作函数门控（TWFG）的理论基础，该函数在时间和能量上进行了光发射，并产生具有热限制的发射率，百分比级别量子效率的接近阈值光电子，以及对时间连贯性的控制。该技术包括使用非离子化长波长光场积极门控通用光电的功能，以产生表面载体密度的绝热调制。我们研究TWFG，以绕过低升发和高量子效率之间的长期权衡，而不受粒子源或光电极的细节的限制。 TWFG承诺为下一代电子和基于加速器的X射线光子源提供新的光发射物理学机会。
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 density at their surface. We examine TWFG as a means to circumvent the long-standing trade-off between low emittance and high quantum efficiency, untethered to particle source or photocathode specifics. TWFG promises new opportunities in photoemission physics for next generation electron and accelerator-based x-ray photon sources.
