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HL: Fachverband Halbleiterphysik

HL 10: Focus Session: Progress in Hybrid Phononic Quantum Technologies II

HL 10.7: Talk

Monday, March 27, 2023, 17:30–17:45, POT 151

Acousto-optoelectric spectroscopy on transition metal dichalcogenide monolayers with surface acoustic waves — Matthias Weiß^1,2, Benjamin Mayer¹, Tobias Petzak², Clemens Strobl¹, •Emeline Nysten^1,2, Ursula Wurstbauer¹, and Hubert Krenner^1,2 — ¹Physikalisches Institut, WWU Münster, Germany — ²Lehrstuhl für Experimentalphysik 1, Universität Augsburg, Germany

Surface acoustic waves have proven to be a useful tool for the control of semiconductor nanostructures optical properties and the dynamical transport of charge carriers [1,2,3]. For instance, SAW spectroscopy was already used to probe the electrical transport inside CVD-grown MoS₂ on LiNbO₃ in a contact-free manner [1]. In this work, we integrated transition metal dichalcogenide monolayer flakes into LiNbO₃ surface acoustic wave devices through a classical exfoliation process. The impact of the SAW on the photoluminescence of the monolayer was systematically studied. The results show a clear increase in the photoluminescence intensity of the monolayer as well a SAW-periodic modulation which can be linked to the SAW-controlled diffusion of the excitons inside the monolayer. [1] Nature Communications 6:8593 (2015) [2] Nano Letters 19:8701-8707 (2019) [3] IEEE Transactions on Quantum Engineering 3:1-17 (2022)