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HL: Fachverband Halbleiterphysik

HL 33: Poster II

HL 33.7: Poster

Wednesday, March 29, 2023, 17:00–19:00, P1

Enhancing photoluminescence and Raman signals in TMDC monolayers via plasmonic nanostructures — •Johannes Krause, Annika Bergmann, Jan-Niklas Heidkamp, Rico Schwartz, and Tobias Korn — Institute of physics, university of Rostock, Rostock, Germany

Novel 2D thin film materials garnered a great interest in recent years. The family of Transition metal dichalcogenides (TMDCs) among those materials is especially appealing because of the indirect-direct bandgap transition and the possibility to stack different composites of the TMDCs on top of each other to achieve so called heterostructures. Herein, we present a technique to define nanostructures on a SiO₂ wafer using thermal scanning probe lithography. Further, we deposit individual TMDC monolayer flakes on top of the metallized structures via the deterministic transfer technique. We characterize our flakes utilizing photoluminescence and Raman measurements, reporting major enhancements effects (∼10x) in PL and minor enhancement (∼3x) in Raman signals.