title: Optical depth localization of nitrogen-vacancy centers in diamond with nanometer accuracy.
abstract: Precise positioning of nitrogen-vacancy (NV) centers is crucial for their application in sensing and quantum information. Here we present a new purely optical technique enabling determination of the NV position with nanometer resolution. We use a confocal microscope to determine the position of individual emitters along the optical axis. Using two separate detection channels, it is possible to simultaneously measure reflected light from the diamond surface and fluorescent light from the NV center and statistically evaluate both signals. An accuracy of 2.6 nm for shallow NV centers was achieved and is consistent with other techniques for depth determination.
authors.forename: Andreas J
authors.initials: AJ
authors.lastname: Häußler
authors.forename: Pascal
authors.initials: P
authors.lastname: Heller
authors.forename: Liam P
authors.initials: LP
authors.lastname: McGuinness
authors.forename: Boris
authors.initials: B
authors.lastname: Naydenov
authors.forename: Fedor
authors.initials: F
authors.lastname: Jelezko
mesh_terms: D003198:Computer Simulation; D018130:Diamond / Q000737:chemistry*; D005453:Fluorescence; D018613:Microscopy, Confocal; D053758:Nanoparticles / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry*; D055620:Optical Phenomena; D012815:Signal Processing, Computer-Assisted
chemical_list: D018130:Diamond; D009584:Nitrogen