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 Pulses — Christian Lux1, •Alexander Kastner1, Stefanie Züllighoven1, Tom Ring1, Cristian Sarpe1, Arne Senftleben1, Matthias Wollenhaupt2, and Thomas Baumert1 — 1Universität 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