Rostock 2019 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MO: Fachverband Molekülphysik

MO 4: Electronic Spectroscopy

MO 4.2: Vortrag

Montag, 11. März 2019, 11:00–11:15, S HS 002 Biologie

Photoelectron circular dichroism observed on the nanosecond timescale — •Alexander Kastner, Tom Ring, Roxana Savulea, Han-gyeol Lee, Hendrike Braun, Arne Senftleben, and Thomas Baumert — Universität Kassel, Institut für Physik und CINSaT, D-34132 Kassel, 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 direction. This effect is known as photoelectron circular dichroism (PECD) and has been investigated by single-photon [1, 2] as well as resonance-enhanced multi-photon ionization using a femtosecond laser [3, 4]. Highly structured asymmetries in the range of ± 10% on bicyclic Ketones were observed featuring pronounced dependence on photoelectron energy and electronic character of intermediate state for fenchone [5]. In addition, we were able to generalize the idea of a chiro-optical response to rotationally tailored fields [6].
Here we report on observation of PECD when using a Nd:YAG nanosecond laser. The possibility to use an ordinary nanosecond laser reduces the technical requirements to apply PECD in analytics.
I. Powis, Adv. Chem. Phys. 138, 267-329, (2008)
L. Nahon et al., J. El. Spectr. 204, 322-334, (2015)
C. Lux et al., Chem. Phys. Chem. 16, 115-137, (2015)
A. Kastner et al., Chem. Phys. Chem. 17, 1119-1122, (2016)
A. Kastner et al., J. Chem. Phys. 147, 013926, (2017)
P. V. Demekhin et al., PRL, accepted, (2018)