Chlouba Tomas, Shiloh Roy, Forsberg Pontus, Hamberg Mathias, Karlsson Mikael, Kozák Martin, Hommelhoff Peter
Opt Express. 2022 Jan 3;30(1):505-510. doi: 10.1364/OE.442752.
The field of dielectric laser accelerators (DLA) garnered a considerable interest in the past six years as it offers novel opportunities in accelerator science and potentially transformative applications. Currently, the most widespread approach considers silicon-based structures due to their low absorption and high refractive index in the infrared spectral region and the well-developed silicon processing technology. In this paper we investigate a diamond as an alternative to silicon, mainly due to its considerably higher damage threshold. In particular, we find that our diamond grating allows a three times higher acceleration gradient (60 MeV/m) compared to silicon gratings designed for a similar electron energy. Using more complex geometries, GeV/m acceleration gradients are within reach for subrelativistic electrons.
在过去六年中，介电激光加速器（DLA）领域引起了广泛关注，因为它在加速器科学领域提供了新的机遇以及具有潜在变革性的应用。目前，最普遍的方法是考虑基于硅的结构，这是由于它们在红外光谱区域具有低吸收率和高折射率，以及成熟的硅加工技术。在本文中，我们研究了用金刚石替代硅，主要是因为其损伤阈值要高得多。特别是，我们发现与为类似电子能量设计的硅光栅相比，我们的金刚石光栅允许的加速梯度高两倍（60 MeV/m）。使用更复杂的几何结构，对于亚相对论电子而言，达到GeV/m的加速梯度是可以实现的。
