论文标题
通过连贯的多光子光发射朝向全表面布里鲁因区域映射
Towards full surface Brillouin zone mapping by coherent multi-photon photoemission
论文作者
论文摘要
我们报告了一种新型的方法，该方法是通过在实验室环境中易于实现的整个布里渊区的连贯多光子光发射带映射。我们激发了一种固态材料AG（110），并具有强烈的飞秒激光脉冲，以激发高阶多光子光发射；角度分辨的电子光谱采集记录光发射的光发射，涉及从占用的样品到未占用的样品带的光学转变，否则可能会被光发射范围隐藏。我们将其作为时间和角度分辨的两色作为互补的超快方法，例如红外泵和极端的紫外线探针，光发射光谱，具有能够测量和控制相干电子动力学的优势。
We report a novel approach for coherent multi-photon photoemission band mapping of the entire Brillouin zone with infrared light that is readily implemented in a laboratory setting. We excite a solid state material, Ag(110), with intense femtosecond laser pulses to excite higher-order multi-photon photoemission; angle-resolved electron spectroscopic acquisition records photoemission at large in-plane momenta involving optical transitions from the occupied to unoccupied bands of the sample that otherwise might remain hidden by the photoemission horizon. We propose this as a complementary ultrafast method to time- and angle-resolved two-color, e.g. infrared pump and extreme ultraviolet probe, photoemission spectroscopy, with the advantage of being able to measure and control the coherent electron dynamics.
