Bonn 2025 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 21: Quantum Optomechanics II
Q 21.8: Vortrag
Dienstag, 11. März 2025, 12:45–13:00, HS I
Towards hybrid cavity optomechanics including an excitonic degree of freedom — •Lukas Schleicher1,2, Leonard Geilen1,3, Anne Rodriguez1,2, Irene Sánchez Arribas1,2, Benedict Brouwer1,3, Alexander Musta1,3, Petricia Peter1,2, Alexander Holleitner1,3, and Eva Weig1,2 — 1Munich Center for Quantum Science and Technology (MCQST), Munich, Germany — 2Chair of Nano and Quantum Sensors, TU Munich, Germany — 3Walter Schottky Institute, TU Munich, Germany
Freely suspended van-der-Waals materials like hBN or transition metal dichalcogenides (TMDC) like MoS2 are interesting hybrid physical systems which allow for the mutual coupling of mechanical, electronic, as well as optical degrees of freedom. The electromechanical coupling is mediated by strain, and leads to a modification of the electronic band structure upon mechanical deflection, which allows for the coupling exitons.
Here, we present first result on mechanical resonators made of suspended monolayer MoS2 membranes. The mechanical mode shape of these resonators is mapped. Moreover, we map spatially the excitonic shift of the material which is related to mechanical strain. These findings pave the way to a hybrid quantum system, also incorporating additional quantum emitters and a ultra high-finesse fiber optical cavity.
Keywords: optomechanical system; excitonic; hexagonal Boron Nitride