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Q: Fachverband Quantenoptik und Photonik
Q 4: Hybrid Quantum Systems
Q 4.6: Vortrag
Montag, 11. März 2024, 12:15–12:30, HS 1199
optical microcavity with coupled single SiV and GeV centers in a nanodiamond for a quantum repeater platform — •Selene Sachero1, Robert Berghaus1, Gregor Bayer1, Florian Feuchmayr1, Andrea B Filipovski1, Patrick Maier1, Lukas Antoniuk1, Niklas Lettner1, Marco Klotz1, Richard Waltrich1, Viatcheslav Agafonov2, and Alexander Kubanek1 — 1Institute for Quantum Optics, Ulm University, Germany — 2Tours University, France
Quantum repeater are essential building block to create a large scale quantum communication network. An ideal quantum repeater nodes efficiently link a quantum memory with photons serving as flying qubits. By coupling group defect centers to an open Fabry-Perot cavity, such an interface can be created.
As such a platform, we propose a fully tunable cavity, composed by two Bragg mirrors, which allows short cavity lengths, and provides efficient coupling of quantum emitters at 4 K.
Here, we show the good optical properties of a single germanium vacancy (GeV-) and its transfer to a Fabry-Perot cavity. The coupling of the GeV- into the resonator is achieved maintaining a high finesse.
Moreover, we couple an individual SiV- into our resonator. We perform resonant photoluminescence measurements, and observe a spectrally stable emitter with a linewidth close to the Fourier limit. We demonstrate coherent optical driving and all-optical initialization and readout of the electron spin in a high external magnetic field.