A Robust Scanning Diamond Sensor for Nanoscale Imaging with Single Nitrogen-Vacancy Centres

 Title: A Robust Scanning Diamond Sensor for Nanoscale Imaging with Single Nitrogen-Vacancy Centres Author: Maletinsky, Patrick; Hong, Sungkun; Grinolds, Michael Sean; Hausmann, Birgit Judith Maria; Lukin, Mikhail D.; Walsworth, Ronald L.; Loncar, Marko; Yacoby, Amir Note: Order does not necessarily reflect citation order of authors. Citation: Maletinsky, Patrick, Sungkun Hong, Michael S. Gringolds, Birgit Hausmann, Mikhail Lukin, Ronald L. Walsworth, Marko Loncar and Amir Yacoby. 2012. A robust scanning diamond sensor for nanoscale imaging with single nitrogen-vacancy centres. Nature Nanotechnology 7(5): 320-324. Full Text & Related Files: Maletinsky_RobustScanning.pdf (3.329Mb; PDF) Abstract: The nitrogen-vacancy defect centre in diamond has potential applications in nanoscale electric and magnetic-ﬁeld sensing, single-photon microscopy, quantum information processing and bioimaging. These applications rely on the ability to position a single nitrogen-vacancy centre within a few nanometres of a sample, and then scan it across the sample surface, while preserving the centre’s spin coherence and readout ﬁdelity. However, existing scanning techniques, which use a single diamond nanocrystal grafted onto the tip of a scanning probe microscope, suffer from short spin coherence times due to poor crystal quality, and from inefﬁcient far-ﬁeld collection of the ﬂuorescence from the nitrogen-vacancy centre. Here, we demonstrate a robust method for scanning a single nitrogen-vacancy centre within tens of nanometres from a sample surface that addresses both of these concerns. This is achieved by positioning a single nitrogen-vacancy centre at the end of a high-purity diamond nanopillar, which we use as the tip of an atomic force microscope. Our approach ensures long nitrogen-vacancy spin coherence times $$\textrm{(∼75 }\mu \textrm{s)}$$, enhanced nitrogen-vacancy collection efﬁciencies due to waveguiding, and mechanical robustness of the device (several weeks of scanning time). We are able to image magnetic domains with widths of 25 nm, and demonstrate a magnetic ﬁeld sensitivity of $$56\textrm{ nT Hz}^{–1/2}$$ at a frequency of 33 kHz, which is unprecedented for scanning nitrogen-vacancy centres. Published Version: doi:10.1038/NNANO.2012.50 Other Sources: http://yacoby.physics.harvard.edu/Publications/A%20robust%20scanning%20diamond%20sensor%20for%20nanoscale%20imaging%20with%20single%20nitrogen-vacancy%20centres_2012.pdf http://arxiv.org/abs/1108.4437 Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:9367006

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Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University