Regensburg 2013 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 58: Poster Session III (Solid-liquid interfaces; Scanning probe and other methods; Electronic structure theory; Spin-orbit interaction)

O 58.48: Poster

Mittwoch, 13. März 2013, 18:15–21:45, Poster B1

The detection of light emitted from the tunneling junction of a low temperature STM — •Ebru Özen, Maren C. Cottin, Johannes Schaffert, Rolf Möller, and Christian A. Bobisch — Faculty of Physics, Center for Nanointegration Duisburg-Essen, University of Duisburg-Essen, 47048 Duisburg, Germany

The decrease in size of the building blocks used in modern electronic devices requires the understanding of electronic transport phenomena down to the atomic level. Beside the elastic tunneling processes in a scanning tunneling microscope (STM) experiment, also inelastic processes take place. This leads to an excitation of the sample. The relaxation may decay e.g. by emission of photons [1]. The spectral analysis of the emitted light from the tunneling junction in the STM experiment provides valuable information about radiative decay channels, e.g. within an adsorbed organic molecule [2]. We implemented an experimental setup for the detection of photons which are emitted during the decay of the excitation of the sample. During first measurements light from the tunneling junction either during field emission or tunneling could efficiently be detected.

[1] R. Berndt et al., Science 262, 1425 (1993). [2] C. Chen et al., Phys. Rev,. Lett. 105, 217402 (2010).