Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 30: Color Centers I
Q 30.1: Vortrag
Mittwoch, 13. März 2024, 11:00–11:15, HS 3118
Spectral stability of V2-centres in sub-micron 4H-SiC membranes — •Jonah Heiler1,2, Jonathan Körber2, Erik Hesselmeier2, Pierre Kuna2, Rainer Stöhr2, Philipp Fuchs3, Misagh Ghezellou4, Jawad Ul-Hassan4, Wolfgang Knolle5, Christoph Becher3, Florian Kaiser1,2, and Jörg Wrachtrup2 — 1MRT Department, Luxembourg Institute of Science and Technology & Department of Physics and Materials Science, University of Luxembourg, Belvaux, Luxembourg — 23rd Institute of Physics, University of Stuttgart, Germany — 3Universität des Saarlandes, Fachrichtung Physik, Saarbrücken, Germany — 4Department of Physics, Chemistry and Biology, Linköping University, Sweden — 5Leibniz-Institute of Surface Engineering (IOM), Leipzig, Germany
Colour centres in solids emerge as a promising quantum technology platform, since they inherently provide a spin-photon interface. Overcoming its low photon extraction efficiency requires nanophotonic structuring, which can reduce the colour centres’ spectral stability. Here, we focus on silicon vacancy colour centres in the industry’s leading third-generation semiconductor silicon carbide and show a systematic large-scale study of their optical properties in sub-µm membranes. We develop a highly reproducible recipe to produce those membranes using chemical mechanical polishing together with reactive ion etching. Further, we observe close-to lifetime limited optical linewidths with almost no signs of spectral wandering in 0.7 µm membranes. Our findings open the avenue for the integration of silicon vacancies into a variety of nanophotonic structures that improve the photon extraction.
Keywords: Colour Centres; Silicon Carbide; Microfabrication