Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 6: Solid State Quantum Optics I

Q 6.4: Talk

Monday, March 11, 2024, 11:45–12:00, HS 3118

Trapping of Nanodiamonds using Optical Tweezers — •Alena Erlenbach, Isabel Cardoso Barbosa, Jonas Gutsche, Stefan Dix, Dennis Lönard, and Artur Widera — Department of Physics and State Research Center OPTIMAS, University of Kaiserslautern-Landau, Erwin-Schroedinger-Str. 46, 67663 Kaiserslautern, Germany

The nitrogen-vacancy-center (NV) in diamond is a promising nanoprobe for measuring temperature and magnetic fields, for which they are incorporated into photonic structures such as waveguides. To optimize the excitation of the NV centers and the detection of their fluorescence through the photonic structure, it is necessary to control the nanodiamonds positions during the fabrication process precisely. Therefore, an optical-tweezer-setup can be incorporated into structuring systems to control the position of the nanodiamonds. In this work, we examine the trapping of nanodiamonds in optical tweezers to quantify the influence of different parameters for trapping, particularly the size of the nanodiamonds. Statistical measurements of nanodiamonds in different solvents reflect that trapping is more efficient for smaller particles. This observation agrees with a simple model considering the contributions of gradient and scattering forces. Furthermore, first nanoparticles were trapped in different solvents, suitable for mixing with photoresists needed to fabricate photonic structures. The results show initial requirements for positioning nanodiamonds in solutions prior to fabricate photonic structures with integrated NV centers.

Keywords: Optical tweezer; nanodiamonds