Regensburg 2025 – scientific programme
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O: Fachverband Oberflächenphysik
O 72: Poster Plasmonics and Nanooptics: Light-Matter Interaction, Spectroscopy
O 72.1: Poster
Wednesday, March 19, 2025, 18:00–20:00, P2
Implementation of a fiber-based cathodoluminescence detector system for a scanning electron microscope — •Filip Majstorovic1, Paul H. Bittorf1, and Nahid Talebi1,2 — 1Institute for Experimental and Applied Physics, Kiel University, Leibnizstraße 19, D-24118 Kiel, Germany — 2Kiel Nano, Surface and Interface Science KiNSIS, Kiel University, Christian-Albrechts-Platz 4, D-24118 Kiel, Germany
Cathodoluminescence (CL) is the light emitted from materials irradiated with the electron beam, within the infrared to ultraviolet spectral range. CL recently has gained a major interest in analyzing quantum materials and emitters, thanks to its high spatial and temporal resolutions. In our study, inside a scanning electron microscope (SEM) high energy and broad bandwidth electron beams are generated. The CL emission is then collected with a detector, consisting of a multimode fiber attached to piezo stages, which allows for nanometer precision movement of the fiber near the sample. We present the variety of possible measurements such a system allows. One component of this is obtaining the spectrum of the emitted light, that for example enables the investigation of plasmonic resonances. Further this detector system provides a way to measure the emission profile by scanning the fiber three-dimensionally along the sample. Such emission profiles give information about the processes responsible for this radiation and show if coherent or incoherent CL are more dominant. Moreover, higher-order correlations unravel a superbunching effect in CL generated from semiconducting samples.
Keywords: Cathodoluminescence; scanning electron microscope; fiber-detector; emission profiles; spectroscopy