Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 39: Posters: Quantum Optics and Photonics III

Q 39.47: Poster

Wednesday, March 11, 2020, 16:30–18:30, Empore Lichthof

Microwave antenna design for fiber-based microcavities — •Jonas Grammel, Maximilian Pallmann, and David Hunger — Physikalisches Institut (PHI), Karlsruher Institut für Technologie, Wolfgang-Gaede-Str.1, 76131 Karlsruhe, Germany

The realization of a quantum repeater is a central subject of current research in the field of optical quantum technologies. One promising platform to implement an efficient spin-photon interface - which is the basic building block of a quantum repeater - is based on NV centers in diamond coupled to tunable, fiber-based microcavities [1,2,3]. Asides to excellent optical cavity-emitter coupling and coherent optical control, one also requires direct control of the spin degree of freedom via microwave radiation [4]. Therefore, we develop a microscopic microwave antenna which is directly integrated in the fiber cavity assembly in a way that isolates the thermal impact of the antenna from the diamond sample [5]. We will describe the current state of the efforts to use this antenna to measure optically detected magnetic resonance and drive arbitrary pulse sequences.

[1] D. Hunger et al., New J. Phys. 12, 065038 (2010) [2] H. Kaupp et al., Phys. Rev. Appl. 6, 054010 (2016) [3] D. Riedel et al., Phys. Rev. X 7, 031040 (2017) [4] S. Bogdanovic et al., APL Photonics 2, 126101 (2017) [5] I. Fedotov et al., Sci Rep 4, 5362 (2015)