Regensburg 2025 – scientific programme
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O: Fachverband Oberflächenphysik
O 43: Scanning Probe Microscopy: Light-Matter Interactions at the Atomic Scale II
O 43.6: Talk
Tuesday, March 18, 2025, 15:15–15:30, H24
Photon blockade in current-driven single-molecule emitters — Andrés Bejarano1,2, •Moritz Frankerl1, Rémi Avriller2, Fabio Pistolesi2, and Thomas Frederiksen1,3 — 1Donostia International Physics Center, Spain — 2Univ. Bordeaux, CNRS, LOMA, France — 3Ikerbasque, Bilbao, Spain
We consider photon emission from a single electronic level embedded in a strongly damped cavity, where photon emission is driven by electronic tunneling events. Using a Lindblad master equation approach we investigate the system dynamics, photon emission spectrum as well as the second-order coherence function g(2)(τ) [1]. We demonstrate that many features observed in scanning tunneling microscopy light-emission experiments can be explained with this simple model. Specifically, restricting the applied bias to the first emission threshold, we find antibunching in the photon statistics irrespective of the coupling strength to the cavity [2]. Employing a higher bias leads to a excitation of states with a photon number greater than one and thus the system shows bunching behavior as well as an emergence of two distinct time scales in the dynamics of g(2)(τ). [1] Q. Schaeverbeke, R. Avriller, T. Frederiksen, F. Pistolesi, PRL 123, 246601 (2019) [2] P.Merino, C. Große, A. Roslawska, K. Kuhnke, K. Kern, Nat. Comm. 6, 8461 (2015)
Keywords: STM; light-matter interaction; Lindblad master equation