Frassetto Fabio, Cacho Cephise, Froud Chris A, Turcu I C Edmund, Villoresi Paolo, Bryan Will A, Springate Emma, Poletto Luca
National Research Council of Italy- Institute of Photonics and Nanotechnologies (CNR-IFN), via Trasea 7, 35131-Padova, Italy.
Opt Express. 2011 Sep 26;19(20):19169-81. doi: 10.1364/OE.19.019169.
Extreme-ultraviolet high-order-harmonic pulses with 1.6·10(7) photons/pulse at 32.5 eV have been separated from multiple harmonic orders by a time-preserving monochromator using a single grating in the off-plane mount. This grating geometry gives minimum temporal broadening and high efficiency. The pulse duration of the monochromatized harmonic pulses has been measured to be in the range 20 to 30 fs when the harmonic process is driven by an intense 30 fs near-infrared pulse. The harmonic photon energy is tunable between 12 and 120 eV. The instrument is used in the monochromatized branch of the Artemis beamline at the Central Laser Facility (UK) for applications in ultrafast electron spectroscopy.
在32.5电子伏特下，每脉冲具有1.6·10⁷个光子的极紫外高次谐波脉冲已通过在离平面安装中使用单个光栅的保时光栅单色仪从多个谐波阶次中分离出来。这种光栅几何结构可实现最小的时间展宽和高效率。当谐波过程由一个30飞秒的强近红外脉冲驱动时，单色化谐波脉冲的脉宽经测量在20至30飞秒范围内。谐波光子能量可在12至120电子伏特之间调谐。该仪器用于英国中央激光设施阿耳忒弥斯光束线的单色化分支，以用于超快电子能谱学应用。
