Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 34: Color Centers II
Q 34.3: Talk
Wednesday, March 13, 2024, 15:15–15:30, HS 1221
Color centers in silicon carbide integrated into a fiber-based Fabry-Pérot microcavity — •Jannis Hessenauer1, Jonathan Körber2, Maximilian Pallmann1, Jawad Ul-Hassan3, Georgy Astakhov4, Florian Kaiser5, Jörg Wrachtrup2, and David Hunger1 — 1Physikalisches Institut, Karlsruher Institut für Technologie, Germany — 23rd Institute of Physics, University of Stuttgart, Germany — 3Department of Physics, Chemistry and Biology, Linköping University, Sweden — 4Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Dresden, Germany — 5MRT Department, Luxembourg Institute of Science and Technology & Department of Physics and Materials Science, University of Luxembourg, Belvaux, Luxembourg
Color centers in silicon carbide (SiC) have recently emerged as promising solid-state spin-photon interfaces. Among those, the two negatively charged silicon vacancy centers in 4H-SiC have been studied extensively, and showed narrow optical linewidths close to the lifetime limit. In this work, we integrate a few micron-thick SiC membrane with color centers into a cryogenic fiber-based Fabry-Pérot-resonator. We characterize the cavity performance and observe a high finesse, indicating low losses introduced by the membrane. We study the complex mode dispersion stemming from the hybridization of the membrane with the empty cavity and the strong birefringence of the material. Finally, we observe cavity-coupled emission of color centers by tuning the cavity resonance over a spectral region while monitoring the fluorescence.
Keywords: Silicon Carbide; Color centers; Fiber-Cavity; Microcavity; Quantum communication