Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 41: Poster: Quantum Sensing

FM 41.24: Poster

Dienstag, 24. September 2019, 16:30–18:30, Tents

Nanodiamonds in three-dimensional direct-laser-written Waveguides for On-Tip-Sensing — •Jonas Gutsche1,2, Stefan Dix1, Alexander Landowski1, and Artur Widera1,21Department of Physics and State Research Center OPTIMAS, University of Kaiserslautern, Germany — 2Graduate School Materials Science in Mainz, Kaiserslautern, Germany

Waveguide-coupled sensors have several applications such as magnetometry, electrometry or thermometry, harnessing the resolution of nano-sized probes as well as tight light control in macroscopic waveguide networks.

We present the incorporation of nanodiamonds into direct-laser-written (DLW) three-dimensional photonic structures. The nanodiamonds house ensembles of 10^3 nitrogen vacancy (NV) centers, acting as probes that can be read-out optically. Guided by on-chip waveguide structures and three-dimensional out of plane couplers integrated nanodiamonds are addressed and read out using a single microscope objective from below the substrate. We show optically detected magnetic resonance spectra together with Rabi oscillations on an effective two-level system in waveguide-embedded nanodiamonds. We compare their performance with free-space emission and numerical simulations.

Based on these structures, we show our approach to utilize DLW for further miniaturization of components needed for NV-magnetometry to a fiber tip. This approach paves the way for on-tip three-dimensional structures leading to a single-device endoscope for optically integrated spin-based sensing.

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DPG-Physik > DPG-Verhandlungen > 2019 > Freiburg