11-eV laser system for high-resolution photoelectron spectroscopy

• Subject Area: Condensed Matter Physics
• Term: Funded in 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 436584166

An extreme ultraviolet laser is requested for the investigation of the electronic structure of novel quantum materials and the development of new spectroscopic methods.The table-top high-brilliance high-resolution 11-eV laser shall(i) enable laboratory-based high-resolution angle-resolved photoelectron spectroscopy with variable polarization and a micron-scale beam spot for cutting-edge electronic structure studies of novel transition-metal dichalcogenide systems including correlated and topological materials, systematically doped compounds, mono- and few-layer systems, and van der Waals heterostructures, as well as for the continuous characterization and optimization of chemical vapor transport-grown bulk transition-metal dichalcogenide crystals,(ii) complement synchrotron-based high-resolution angle-resolved photoelectron spectroscopy as well as free-electron laser- and high-harmonic generation-based time-and angle-resolved photoelectron spectroscopy studies and, in particular, increase the effectiveness and efficiency of these experiments by pre-screening and characterization of samples prior to beamtimes,(iii) provide a flexible laboratory-based angle-resolved photoelectron spectroscopy setup for the exploration of new measurement concepts, including, for example, methods for in situ sample growth and in situ electrical biasing, and(iv) make available a powerful laser light source for the development of new measurement methods, such as in operando spectroscopy of plasma-solid interfaces.

• DFG Programme: Major Research Instrumentation
• Major Instrumentation: 11-eV-Lasersystem für hochauflösende Photoelektronenspektroskopie
• Instrumentation Group: 1780 Photoelektronenspektrometer (UPS und XPS)
• Applicant Institution: Christian-Albrechts-Universität zu Kiel
• Leader: Professor Dr. Kai Rossnagel