High-power ultrashort pulse laser system for simultaneous generation of ultrashort THz-pump and VUV-probe pulses

高功率超短脉冲激光系统，用于同时生成超短太赫兹泵浦和 VUV 探测脉冲

• 批准号: 445487514
• 金额: --
• 依托单位: Universität Regensburg
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/445487514?language=en
• 关键词: power; ultrashort; pulse; laser; system

The requested high-power ultrashort pulse laser system together with a tailored vacuum ultraviolet source should provide phase-stable subcycle pump pulses in the multi-THz spectral domain and vacu-um ultraviolet probe pulses with photon energies between 20 and 30 eV at repetition rates between 10 and 200 kHz.Based on our recent experiments on subcycle-APRES (angle-resolved photoemission spectroscopy), the new system should be employed to make the first-ever femtosecond-slow-motion film of lightwave-driven electrons in the band structure of a solid over the entire first Brillouin zone. In a wide variety of modern quantum materials like graphene, transition metal dichal-cogenides or surface states of topological insulators, novel aspects of ultrafast electron dynamics should be mapped out, on the relevant time and energy scales. Examples are the observation of Bloch oscillations and the ultrafast switching of the valley pseudospin or the investigation of strongly corre-lated electron systems, in the band structure of the underlying solids. Additionally, the highly stable laser system with a high repetition rate is necessary to measure the weak signals that occur in high harmonic generation in atomically thin solids or surface states of topological insulators. During these experiments, we want to study lightwave electronics and spintronics on topological insulators, by Erwin Schrödinger theoretically predicted Zitterbewegung and the effects of topologically non-trivial quantum paths. Finally, the new laser source should also be used to investigate theoretically predicted effects in non-adiabatic cavity quantum electrodynamics similar to Unruh-Hawking radiation of black holes.The requested laser source is a strategic key element for the exploration of emergent relativistic ef-fects in condensed matter at the University of Regensburg. The experiments are, thus, especially rele-vant for the Collaborative Research Center and numerous bilateral interdisciplinary collabora-tions.

所需的高功率超短脉冲激光系统与定制的真空紫外源一起应提供多太赫兹光谱域中的相位稳定的子周期泵浦脉冲和光子能量在 20 至 30 eV 之间、重复率在 10 至 10 之间的真空紫外探测脉冲。 200 kHz。根据我们最近的子周期-APRES（角分辨光电子能谱）实验，应该采用新系统来制作在整个第一布里渊区的固体能带结构中，首次出现光波驱动电子的飞秒慢运动薄膜，适用于各种现代量子材料，如石墨烯、过渡金属二卤族化物或拓扑绝缘体的表面态。 ，应该在相关的时间和能量尺度上绘制出超快电子动力学的新颖方面，例如布洛赫振荡的观察和谷赝自旋的超快切换或研究。此外，具有高重复率的高度稳定的激光系统对于测量原子薄固体或拓扑表面态中高次谐波产生中出现的微弱信号是必要的。在这些实验中，我们想要研究拓扑绝缘体上的光波电子学和自旋电子学，埃尔文·薛定谔在理论上预测了 Zitterbewegung 和拓扑非平凡量子路径的影响。最后，新的激光源还应该用于研究类似于黑洞的安鲁-霍金辐射的非绝热腔量子电动力学中理论上预测的效应。所需的激光源是探索新兴相对论效应的战略关键要素因此，这些实验与合作研究中心和众多双边跨学科合作特别相关。