Bonn 2025 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 1: Chirality
MO 1.6: Vortrag
Montag, 10. März 2025, 12:30–12:45, HS XVI
Chirality induced spin polarization in one-photon ionization by circularly polarized light — •Philip Caesar Flores1, Stefanos Carlstrom1, Serguei Patchkovskii1, Andres Ordonez2,3, and Olga Smirnova1,4,5 — 1Max-Born-Institut, Max-Born-Str. 2A, 12489 Berlin, Germany — 2Department of Physics, Imperial College London, SW7 2BW London, United Kingdom — 3Department of Chemistry, Queen Mary University of London, E1 4NS London, United Kingdom — 4Technische Universitat Berlin, 10623 Berlin, Germany — 5Technion, Israel Institute of Technology, 3200003, Haifa, Israel
Geometric magnetism controls the degree of enantiosensitive response in photoionization of chiral molecules and leads to new extremely efficient enantiosensitive observables (Commun. phys. 6, 2023, 257). Here, we show that the same phenomenon is responsible for: (i) spin-resolved enantiosensitive molecular orientation in photoionization, and (ii) spin-polarization of photoelectrons ejected from atoms and chiral molecules by circularly polarized fields. Our results provide a missing fundamental link between chirality and spin-polarization, and demonstrate that the coupling of geometric field to spin leads to high spin-polarization, which can be achieved even for very small spin-orbit interaction. Our conclusions are illustrated for synthetic chiral matter. We perform ab initio simulations of spin dynamics in photoionization of Argon atom using fully coupled spin-orbit code (Phys. Rev. A 106, 2022, 042806), and construct chiral superpositions of electronic states in Argon to quantify the link between chirality and spin-polarization in chiral targets.
Keywords: chirality; molecules; Single- and few-photon ionization & excitation; spin; dipole approximation