Fabrication of all diamond scanning probes for nanoscale magnetometry

Appel, Patrick and Neu, Elke and Ganzhorn, Marc and Barfuss, Arne and Batzer, Marietta and Gratz, Micha and Tschoepe, Andreas and Maletinsky, Patrick. (2016) Fabrication of all diamond scanning probes for nanoscale magnetometry. Review of Scientific Instruments, 87 (6). 063703.

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The electronic spin of the nitrogen vacancy (NV) center in diamond forms an atomically sized, highly sensitive sensor for magnetic fields. To harness the full potential of individual NV centers for sensing with high sensitivity and nanoscale spatial resolution, NV centers have to be incorporated into scanning probe structures enabling controlled scanning in close proximity to the sample surface. Here, we present an optimized procedure to fabricate single-crystal, all-diamond scanning probes starting from commercially available diamond and show a highly efficient and robust approach for integrating these devices in a generic atomic force microscope. Our scanning probes consisting of a scanning nanopillar (200 nm diameter, 1-2 mu m length) on a thin (<1 mu m) cantilever structure enable efficient light extraction from diamond in combination with a high magnetic field sensitivity (eta(AC) approximate to 50 +/- 20 nT/root Hz). As a first application of our scanning probes, we image the magnetic stray field of a single Ni nanorod. We show that this stray field can be approximated by a single dipole and estimate the NV-to-sample distance to a few tens of nanometer, which sets the achievable resolution of our scanning probes. (C) 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Georg H. Endress-Stiftungsprofessur für Experimentalphysik (Maletinsky)
UniBasel Contributors:Maletinsky, Patrick M.
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:AIP Publishing
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:01 Mar 2017 13:22
Deposited On:01 Mar 2017 13:21

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