Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 39: Poster V
Q 39.15: Poster
Wednesday, March 13, 2024, 17:00–19:00, Aula Foyer
Microcontroller-optimized measurement electronics for NV-centers — •Dennis Stiegekötter1, Jens Pogorzelski1, Ludwig Horsthemke1, Markus Gregor2, and Peter Glösekötter1 — 1Department of Electrical Engineering and Computer Science, FH Münster University of Applied Sciences, Stegerwaldstraße 39, 48565 Steinfurt, Germany — 2Department of Engineering Physics, FH Münster University of Applied Sciences, Stegerwaldstraße 39, 48565 Steinfurt, Germany
The integration and miniaturization of magnetic sensors based on diamonds with nitrogen vacancy centers is largely focused on the sensor tip. This means that the underlying electronics for excitation and readout of the spin states still offers great potential for further innovations. In this work the electronics adjust the power of the microwave. This makes it possible to tune the Rabi oscillation so that the time for a pi pulse is adapted to the microcontroller's limited temporal pulse resolution of Tp,min = 53.3 ns. This allows coherent control to be achieved even with a simple microcontroller. For this purpose, laboratory devices such as lock-in amplifier, photodetector and microwave source are broken down to their relevant functions and integrated on a (82 x 167) mm2 PCB with a STM32G491. Only two Rabi oscillations at different microwave powers need to be recorded in order to extract the Rabi frequency using the fast fourier transformation and calibrate the system. This allows the time of a pi pulse to be synchronized to the pulse length of the microcontroller.
Keywords: NV-center; Rabi oscillation; Microcontroller