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Q: Fachverband Quantenoptik und Photonik

Q 38: Nano-Optics (Single Quantum Emitters) II

Q 38.3: Vortrag

Mittwoch, 13. März 2019, 14:30–14:45, S SR 112 Maschb.

Towards reliable, scalable scaning probe sensing using color centers in diamond — •Richard Nelz, Marie Niederländer, Lara Render, Oliver Opaluch, Michel Challier, Mariusz Radtke, Abdallah Slablab, and Elke Neu — Universität des Saarlandes, Fakultät NT - Fachrichtung Physik, Campus E2.6, 66123 Saarbrücken

The negatively charged nitrogen vacancy (NV) color center in diamond is a bright, photo-stable dipole emitter [1]. Due to its optically addressable spin states it is used for e.g. electrical and magnetic field sensing applications. In recent years, shallowly implanted NV centers in nanopillars have been introduced as scanning probes for high resolution imaging [2]. We aim to apply these probes to life science applications. However, these applications currently suffer from an insufficient control of the surface termination of the devices leading to a potentially unstable charge state of the color center as well as a poor fabrication yield. We here show routes to overcome these issues. We discuss charge state stabilization of shallow NV centers via different surface treatments, show upscaling capabilities of the nanofabrication by using novel diamond material [3] and we introduce sensing applications relevant for life sciences.
[1] Bernardi et al., Crystals 7 124 (2017).

[2] Appel et al., Rev. Sci. Instrum. 87 063703 (2016).

[3] Nelz et al., arXiv:1810.09350 (2018).