Erlangen 2018 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 43: Nano-Optics (Single Quantum Emitters)

Q 43.2: Vortrag

Mittwoch, 7. März 2018, 14:30–14:45, K 0.023

Optimization of diamond nanopillars for nanoscale sensing applications — •Philipp Fuchs, Michel Challier, and Elke Neu — Universität des Saarlandes, Fakultät NT - Fachrichtung Physik, Campus E2.6, 66123 Saarbrücken

The negatively-charged nitrogen vacancy center (NV) in diamond has become a very promising candidate for the implementation of nanoscale quantum sensors. Especially its electronic spin system is highly-suitable for magnetic field sensing and can be read out using the NV’s luminescence. To fully harness the NV’s nanoscale sensing capabilities, we use cylindrical diamond structures, so-called nanopillars, on thin diamond membranes as atomic force microscopy probes. Placing an NV shallowly below the top facet of such a pillar enables sensing and imaging with nanoscale spatial resolution. To achieve maximum sensitivity, it is crucial to maximize the absolute number of collected NV luminescence photons. In this talk, we show results from comprehensive simulations aiming towards the optimization of the photonic properties of such pillars to reach this goal. Besides a detailed analysis of the influence of different geometric parameters, e. g. length, diameter and taper angle, we also show an optimized set of parameters which maximizes the collectible NV luminescence.