Berlin 2024 – scientific programme
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O: Fachverband Oberflächenphysik
O 72: Poster: Scanning Probe Microscopy: Light Matter Interaction at Atomic Scales
O 72.11: Poster
Wednesday, March 20, 2024, 18:00–20:00, Poster D
Theory of photo and electroluminescence in a scanning tunneling microscope — •Tomáš Neuman1, Sofia Canola1, Anna Roslawska2, Katharina Kaiser3, Alex Boeglin3, and Guillaume Schull3 — 1Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 16200 Prague, Czech Republic — 2Max-Planck Institute for Solid-State Research, DE-70569 Stuttgart, Germany. — 3Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France
I will present a theoretical perspective on a microscopy technique that combines the atomic-scale resolution of a scanning-tunneling microscope (STM) with optics. I will explain how this method, taking advantage of phenomena such as the optical Stark shift or plasmonic Purcell effect, can reveal excited-state properties of nanoscale samples with unprecedented spatial resolution. Besides introducing the method and the mechanism of STM-induced luminescence (STML) applied to dye molecules, I will show theoretical considerations concerning some of its applications and extensions including the study of vibronic features in the STML spectra and imaging, phototautomerization of a single molecule, and a theoretical view on correlated photon emission from electrically driven organic molecules in an STM.
Keywords: electroluminescence; scanning tunneling microscope; plasmonics; molecular exciton; light-matter interaction