论文标题
高repetition-Extrate-RepeTition-rate的超快速偏振单色极端紫外线源
Ultrafast Polarization-Tunable Monochromatic Extreme Ultraviolet Source at High-Repetition-Rate
论文作者
论文摘要
我们报告了具有极化可调性的高阶谐波生成（HHG）的超快高重复率（250 kHz）单色极端紫外线（21.6 eV）源，该源具有极化可调性，该源是专门为时间和角度分辨的光学光学光谱图中的多模式二分法而设计的。使用环形光束驾驶HHG使我们能够在保持线性极化轴角可调性的同时，在空间上将高功率515 nm驱动激光器与XUV Beamlet分开。这可以通过固定的全反射相位转移来控制XUV辐射的极化状态。该方案导致5.7 $ \ times $ 10 $^{12} $ photons/s的源亮度为21.6 ev（最多4 $ \ times $ 10 $^{11} $ photons/s target上的$ 90 $ \％$。
We report on the development of a high-order harmonic generation (HHG)-based ultrafast high-repetition-rate (250 kHz) monochromatic extreme ultraviolet (21.6 eV) source with polarization tunability, specifically designed for multi-modal dichroism in time- and angle-resolved photoemission spectroscopy. Driving HHG using an annular beam allows us to spatially separate the high-power 515 nm driving laser from the XUV beamlet while preserving the linear polarization axis angle tunability. This enables controlling the polarization state of the XUV radiation with a fixed all-reflective phase-shifter. This scheme leads to a source brightness of 5.7$\times$10$^{12}$ photons/s at 21.6 eV (up to 4$\times$10$^{11}$ photons/s on target) with ellipticities as high as 90$\%$.
