Dresden 2026 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 43: Scanning probe microscopy: light matter interaction at atomic scales – Poster
O 43.11: Poster
Dienstag, 10. März 2026, 14:00–16:00, P2
Design of a light-coupled high-magnetic-field Scanning Tunneling Microscope — •Colin Geuder1, Marco Mönnich1, Kurt Lichtenberg1, Susanne Baumann1, and Sebastian Loth1,2 — 1University of Stuttgart, Institute for Functional Matter and Quantum Technologies. — 22Center for Integrated Quantum Science and Technology (IQST), University of Stuttgart.
Light-matter interaction at the nanoscale lies at the heart of many fundamental phenomena ranging from light harvesting to ultrafast lightwave electronics. However, accessing magnetic degrees of freedom through light-matter interaction at the atomic scale presents unique challenges. Scanning tunneling microscopy (STM) is the ideal tool, that can locally probe and excite these different interactions at atomic length scales. Here, we present the design of an STM that combines optical access with a large numerical aperture, magnetic fields up to 5 T, and temperatures below 2 K. We mitigate thermal loads introduced by the high-NA optical access through a combination of fiber coupling and radiation blocks at several stages of the cryostat's shields. This instrument enables studies of magnetic degrees of freedom in nanoscale light-matter interaction, such as magnon-photon coupling or exciton-magnon transport in layered materials.
Keywords: Scanning tunneling microscopy; Light-matter interaction; Instrument design; Light-coupled STM