Regensburg 2022 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 5: Implementations: Solid state systems
QI 5.4: Vortrag
Dienstag, 6. September 2022, 10:30–10:45, H8
Nitrogen vacancy centers in diamond membranes coupled to an optical microcavity — •Maximilian Pallmann1, Kerim Köster1, Jonathan Körber3, Julia Heupel2, Rainer Stöhr3, Timon Eichhorn1, Larissa Kohler1, Cyril Popov2, and David Hunger1 — 1Karlsruher Institut für Technologie — 2Universität Kassel — 3Universität Stuttgart
Color centers in diamond centers are very promising candidates for applications in quantum communication and metrology. The nitrogen vacancy center (NV) stands out due to its exceptional spin coherence properties. On the other hand, it suffers from rather bad optical properties due to significant phonon coupling, and only 3% of the emitted light belongs to the Zero phonon line (ZPL). This can be overcome by coupling the emitters to optical cavities, making use of the Purcell effect.
In our experiment, we integrate a diamond membrane to an open access fiber-based Fabry-Perot microcavity [1] to attain emission enhancement into a single well-collectable mode as well as spectral filtering. We investigate the influence of the diamond membrane on the optical properties of the cavity.
We present Purcell-enhanced ensemble-fluorescence of shallow-implanted NV centers and observe cavity-induced collective effects that lead to a bunching behavior in the emission.
[1] Heupel,Pallmann,Körber.Micromachines 2020, 11, 1080;