The Infrared Free-Electron Laser at the Fritz Haber Institute: A Tool for IR Spectroscopy of Molecules, Clusters, and Solids
Lecturer: Dr. Wieland Schöllkopf (Fritz Haber Institute of the Max Planck Society)
Time: 2016-03-29 15:00
Place: Room 939, New Chemistry Building
Detail: At the Fritz Haber Institute (FHI) in Berlin, Germany, we operate a mid-infrared free-electron laser (FEL). The FEL is driven by an electron accelerator providing a final electron energy adjustable from 15 to 50 MeV. Pulsed radiation with up to 100 mJ pulse energy at about 0.5% relative bandwidth is routinely produced in the wavelength range from 3 to 48 μm. We will describe the FEL design and its performance and give an overview of the FHI FEL facility. In addition, we will present selected results recently gained with the FHI FEL in three different fields: (1) spectroscopy of bio-molecules (saccharides, peptides and small proteins) in the gas phase or embedded in superfluid helium nano-droplets at 0.4 K; (2) spectroscopy of mass-selected metal and metal-oxide clusters as well as protonated water clusters in the gas phase; and (3) second-harmonic generation (SHG) spectroscopy of solids and nanostructures.
Organizer: School of Chemistry and Materials Science