Berlin 2024 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 37: Poster: Electronic Structure of Surfaces and Spectroscopy of Surface States
O 37.6: Poster
Dienstag, 19. März 2024, 18:00–20:00, Poster D
Influence of optical orbital angular momentum on the circular dichroism of Rashba system surface states — •Jannis Leßmeister1, Tobias Eul2, Benjamin Stadtmüller1, and Martin Aeschlimann1 — 1Department of Physics and Research Center OPTIMAS, RPTU Kaiserslautern-Landau, Germany — 2Institute of Experimental and Applied Physics, University of Kiel, Germany
Since its discovery in 1992 [1], twisted light has found its way into a wide variety of research areas and applications. Recently the interaction between its intrinsic orbital angular momentum (OAM) and condensed matter has become a steadily growing field of research [2].
In our research we employ momentum microscopy to gain new insights into the interaction of twisted light with metallic surfaces. Using a circularly polarized light beam carrying OAM we investigate the circular dichroism of the Au(111) Shockley surface state. We particularly focus on the influence of the photonic OAM on the dichroism signal of materials with different atomic spin-orbit strengths.
[1] Allen et al., Phys. Rev. A 45 (1992)
[2] Quinterio Rosen et al., Rev. Mod. Phys 94 (2022)
Keywords: orbital angular momentum; twisted light; optical vortices; circular dichroism; momentum microscopy