SAMOP 2023 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 23: Poster II (joint session QI/Q)
QI 23.22: Poster
Mittwoch, 8. März 2023, 16:30–19:00, Empore Lichthof
Magnetometry with NV centers and Waveguide-Assisted Detection Channels — •Sajedeh Shahbazi1, Michael Hoese1, Michael K. Koch1,2, Vibhav Bharadwaj1,3, Johannes Lang1, Argyro N. Giakoumaki3, Roberta Ramponi3, Fedor Jelezko1,2, Shane M. Eaton3, and Alexander Kubanek1,2 — 1Institute for Quantum Optics, Ulm University, Ulm, Germany — 2Center for Integrated Quantum Science and Technology (IQst), Ulm University, Ulm, Germany — 3Institute for Photonics and Nanotechnologies (IFN) - CNR, Milano, 20133, Italy
The negatively charged Nitrogen-Vacancy(NV) center in diamonds has shown great success in nanoscale, high-sensitivity magnetometry. Efficient fluorescence detection is crucial for improving sensitivity and for practical sensor-integrated devices. One way to approach such a goal is using ultrafast laser writing waveguides on the diamond to create such an on-chip integrated quantum sensor. Here, we present femtosecond laser-written type II waveguides on a diamond surface, integrated with NV centers a few nanometers below the diamond surface while covering the entire mode field of waveguides [1]. We experimentally verify the coupling efficiency and the detection of magnetic resonance signals through the waveguides to perform magnetic field sensing. In the future, our approach will enable the development of two-dimensional sensing arrays facilitating spatially and temporally correlated magnetometry.
[1] M. Hoese et al., Phys. Rev. Applied 15, 054059 (2021)