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O: Fachverband Oberflächenphysik

O 20: Poster Scanning Probe Microscopy: Light-Matter Interactions at the Atomic Scale

O 20.10: Poster

Montag, 17. März 2025, 18:00–20:00, P2

Investigations of the plasmon excitation of C60 multilayers on Au(111) using STM induced luminescence — •Andreas Reutter, Yannis Hilgers, Markus Etzkorn, and Uta Schlickum — Institute of Applied Physics - LENA, TU Braunschweig

In recent years, Scanning Tunneling Microscopy induced luminescence (STML) has gathered great interest, as it allows to investigate optical properties in addition to normal STM measurements, both with atomic spatial resolution. Since its development, the main challenge of this method is to obtain reasonable photon intensities.

We succeeded in building a setup with a greatly increased detection efficiency by using a parabolic mirror inside the STM, that covers 75% of the upper hemisphere.

Here, we present STML measurements of surface plasmons on C60 on Au(111) as a model system for the effects of an organic semiconductor on a metal surface [1]. We will present conductance and optical spectroscopy measurements as well as photon yields for different number fo C60 layers and different applied voltages.

[1] Große, Christoph; Merino, Pablo; Rosławska, Anna; Gunnarsson, Olle; Kuhnke, Klaus; Kern, Klaus; ACS Nano, 11, 1230 (2017).

Keywords: STM; Surface Plasmons; C60; STML