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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 Stienkemeier11Physikalisches 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)

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