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Heidelberg 2015 – scientific programme

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MO: Fachverband Molekülphysik

MO 3: Femtosecond Spectroscopy 1

MO 3.4: Talk

Monday, March 23, 2015, 15:30–15:45, PH/HS1

Photoelectron Circular Dichroism from Multiphoton Ionization with Femtosecond Laser PulsesChristian Lux1, •Alexander Kastner1, Stefanie Züllighoven1, Tom Ring1, Cristian Sarpe1, Arne Senftleben1, Matthias Wollenhaupt2, and Thomas Baumert11Universität Kassel, Institut für Physik und CINSaT, D-34132 Kassel, Germany — 2Carl von Ossietzky Universität Oldenburg, Institut für Physik, D-26129 Oldenburg, Germany

The asymmetry of photoelectron angular distributions from randomly oriented enantiomers of chiral molecules in the ionization with circularly polarized light arises in forward/backward direction with respect to the light propagation. This effect was termed Photoelectron Circular Dichroism (PECD) and so far investigated using synchrotron radiation [1]. In our recent publication [2] we demonstrated that PECD is accessible via a Resonance Enhanced Multi-Photon Ionization (REMPI) using femtosecond laser pulses. We observed highly structured asymmetries in the range of ± 10%. Attributed to the MPI high order odd Legendre polynomials appear in the measured PECD. In this talk we show our recent findings in above-threshold ionization and enantiomeric purity studies on bicyclic Ketones. A first test on molecular modification on Phenylethanol is demonstrated. The strength of PECD can be determined by quantitative measures [3].
I. Powis in S. A. Rice (Ed.): Adv. Chem. Phys. 138, 267-329 (2008)
C. Lux et al., Angew. Chem. Int. Ed. 51, 5001-5005 (2012)
C. Lux et al., ChemPhysChem, DOI:10.1002/cphc.201402643

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