Ultrafast low-temperature UHV near-field microscope

超快低温特高压近场显微镜

• 批准号: 417226546
• 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: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/417226546?language=en
• 关键词: Ultrafast; low; temperature; UHV; near

The recent demonstration of multi-terahertz near-field microscopy with subcycle temporal resolution by Rupert Huber’s group prompted a flurry of new research developments in ultrafast science. Yet, the current concept is limited to the observation of samples in ambient air. For systematic applications in solid state physics it is indispensable to investigate samples also at low temperature and in ultrahigh vacuum (UHV). The microscopy system requested here will fill this gap and open a new chapter in near-field microscopy: The spatio-temporal observation of phase transitions promises novel insights into high-temperature superconductivity as well as charge- and spin-density waves. Furthermore, polaritons in van der Waals-bonded solids and on topological insulators will be studied in space and time, in a temperature regime where damping is strongly suppressed. The dynamics and internal structure of single excitons in semiconductor quantum dots and the dynamics of charge separation at grain boundaries of perovskite solar cells will be accessible. The new instrument is, thus, of immediate relevance for scientific questions targeted in the ongoing research initiatives. The microscope will also be used for key pilot experiments for the recently accepted new research building (Forschungsbau) "Regensburg Center for Ultrafast Nanoscopy (RUN)".

最近鲁珀特胡贝尔的小组展示了具有亚周期时间分辨率的多太赫兹近场显微镜，这引发了超快科学领域一系列新的研究进展。然而，目前的概念仅限于观察环境空气中的样品。对于固体物理学的系统应用，在低温和超高真空（UHV）下研究样品是必不可少的。这里要求的显微镜系统将填补这一空白，并打开近场显微镜的新篇章：相变的时空观察承诺对高温超导性以及电荷和自旋密度波的新见解。此外，极化激元在货车范德华键合固体和拓扑绝缘体将研究在空间和时间，在一个温度制度，阻尼是强烈抑制。半导体量子点中单个激子的动力学和内部结构以及钙钛矿太阳能电池晶界电荷分离的动力学将是可访问的。因此，新仪器与正在进行的研究计划中针对的科学问题具有直接相关性。该显微镜还将用于最近接受的新研究大楼（Forschungsbau）“里根斯堡超快纳米显微镜中心（RUN）"的关键试点实验。