Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 14: Ultrafast electron dynamics at surface and interfaces I
O 14.1: Hauptvortrag
Montag, 9. März 2026, 15:00–15:30, TRE/MATH
Spin and time-resolved ARPES and the orbital angular momentum of light — Pierre Nonnon1,2, Romain Géneaux1, Karol Hricovini1,2, Christine Richter1,2, David Bresteau1, and •Mauro Fanciulli1,2 — 1Cergy Paris University, France — 2LIDYL CEA Saclay, France
I will present the recently developed Panoramix beamline at Attolab, open to users, which allows for spin, time and angle-resolved photoemission spectroscopy (STARPES) experiments. The combination of a high harmonic generation (HHG) setup with tunable repetition rate and pulse duration, and a hemispherical analyzer with a 3D spin detector, permits to study charge and spin ultrafast dynamics in material surfaces. As an example, I will compare the observation of chiroptical resonant control of spin polarized excitons in bulk 2H-WSe2, to how the spin polarization changes for electrons pumped beyond bandgap resonance in the unoccupied conduction band. In the search of ever-increasing multidimensional spectroscopic techniques, I will conclude on the possibility to further include exotic light pulses with azimuthally varying phase or polarization, and how they might affect the photoemission process.
Keywords: Spin-resolved ARPES; Time-resolved ARPES; WSe2; excitons; orbital angular momentum of light