Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 23: Poster I
Q 23.10: Poster
Tuesday, March 12, 2024, 17:00–19:00, Tent B
A cavity-integrated microwave antenna for spin manipulation of Nitrogen-Vacancy center in diamond — •Andras Lauko1, Kerim Köster1, Jeremias Resch1, Julia Heupel2, Cyril Popov2, and David Hunger1 — 1Karlsruher Institut für Technologie, Karlsruhe, DE — 2Universität Kassel, Kassel, DE
In the competitive field of research for the realization of a quantum repeater, nitrogen-vacancy color centers in diamonds are a promising candidate for their optically addressable spin states. A possible platform to enhance the spin-photon interactions is an optical fiber based, tuneable Fabry-Perot cavity, allowing for an open access to the sample. This motivates the integration of a microwave antenna into the resonator, combining the sophisticated coherent control of the spin states of the nitrogen-vacancy center with the benefits provided by the cavity, namely the spatially and spectrally improved emission.
This work arrives at the cavity-integrated microwave antenna in two stages. First, a widely used antenna design, called the wire loop antenna design is modified and fabricated. Then the antenna is integrated into a confocal microscopy setup and experiments involving the measurement of Rabi oscillations are presented.
Lastly, the antenna is mounted into an optical fiber-based microcavity and Rabi frequencies surpassing 10 MHz are measured. The optical performance is unaffected by the antenna and the thermal effects on the cavity caused by the microwave excitation are investigated.
Keywords: NV centers; Microcavity; Microwave; Rabi oscillation