Hannover 2013 – scientific programme

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MO: Fachverband Molekülphysik

MO 27: Poster 3: Collisions, Electronic Spectroscopy, Energy Transfer, Quantum Chemistry, Molecular Dynamics, Photochemistry, Spectroscopy in He-Droplets

MO 27.10: Poster

Thursday, March 21, 2013, 16:00–18:30, Empore Lichthof

Using a VECSEL for IR-Spectroscopy of CO₂ in Helium-Nanodroplets — •Michael Richter¹, Sebastian Kaspar², Markus Müller¹, Marcel Rattunde², Joachim Wagner², and Frank Stienkemeier¹ — ¹Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str. 3, D-79104 Freiburg im Breisgau. — ²Fraunhofer-Institut für Angewandte Festkörperphysik, Tullastrasse 72, 79108 Freiburg im Breisgau.

A new Vertical-External-Cavity Surface-Emitting-Laser with comparatively high output power >100mW and narrow bandwidth is used in order to investigate the overtone transitions 12⁰1 ← 00⁰0 and 20⁰1 ← 00⁰0 of carbon dioxide. In the gas phase transition wavenumbers are around 4976 and 5099 1/cm. We expect high resolution spectra due to the particular narrow linewidth of the laser system [1]. Furthermore, we plan to probe these molecules inside helium nanodroplets in order to study the interaction with the ultra cold (370mK) and superfluid helium environment. In particular, one expects relevant information on reduced rotational constants and the role of a normal fluid fraction in the vicinity of the dopant molecule.

[1]: B. Rösener, S. Kaspar, et al., Optics Letters 36, 18, 3587 (2011)