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HL: Fachverband Halbleiterphysik

HL 3: 2D Materials I – Excitonic properties

HL 3.9: Talk

Monday, March 9, 2026, 11:45–12:00, POT/0081

In-situ mapping of pressure-induced exciton traps in suspended MoS2 monolayers using Fabry-Perot interference — •Niklas Walter^1,3, Leonard Geilen^1,3, Lukas Schleicher^2,3, Alexander Musta^1,3, Anne Rodriguez³, Benedict Brouwer^1,3, Eva Weig^2,3, and Alexander Holleitner^1,3 — ¹Walter Schottky Institute, TU Munich, Germany — ²Chair of Nano and Quantum Sensors, TU Munich, Germany — ³Munich Center for Quantum Science and Technology (MCQST), Munich, Germany

We demonstrate the in-situ readout of the spatial profile of suspended MoS2 monolayers hosted on substrates with nanostructured holes. As the profiles are spatially bent, the suspended MoS2 monolayers act as exciton traps with a tunable luminescence intensity and energy. The tunability is realized by controlling the environmental pressure on the monolayers, which allows one to control hundreds of suspended MoS2 monolayers on a single substrate. The in-situ readout is based on Fabry-Perot interferences and a model of the corresponding reflectance contrast maps of the investigated monolayers.

Keywords: Excitons; In-situ readout; Suspended MoS2; TMDC; Optomechanics