SAMOP 2023 – scientific programme

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QI: Fachverband Quanteninformation

QI 23: Poster II (joint session QI/Q)

QI 23.26: Poster

Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof

Control of NV centers in nanodiamonds for sensing applications — •Dennis Lönard and Artur Widera — Physics Department and State Research Center OPTIMAS, RPTU Kaiserslautern, Erwin-Schroedinger-Str. 46, 67663 Kaiserslautern, Germany

The nitrogen-vacancy (NV) color center in diamond is an essential platform for magnetic field sensing for technical and biological applications. One major advantage is that the spin state of the NV-center can be read out optically via the fluorescence. Different spin manipulation schemes, like Ramsay or Hahn echo sequences, have been proposed to influence the interaction between the final spin state and the magnetic field that is to be measured. However, the experimentally achieved sensitivities to outer magnetic fields is still far from their theoretical limits, each measurement scheme having its own set of limitations, often due to the dephasing of the spin states of neighboring NV-centers. I will present our work to further improve the limits of sensing, spanning from technical control to the prospect of combining different methods of manipulating and sensing the NV center and exploiting their multi-level structure.