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O: Fachverband Oberflächenphysik

O 51: Nanostructures at Surfaces: 1D and 2D Structures and Networks

O 51.14: Poster

Dienstag, 21. März 2017, 18:30–20:30, P1C

Fabrication and investigation of near-surface spin centers in high-purity single crystal diamond — •Nicolas Wöhrl¹, Reinhard Remfort¹, Stefan Borgsdorf², Tanmoy Chakraborty³, Ulrich Köhler², Dieter Suter³, and Volker Buck¹ — ¹Faculty of Physics and CENIDE, University of Duisburg-Essen, Lotharstraße 1, 47057 Duisburg, Germany — ²Experimentalphysik IV, AG Oberflächen, Ruhr-Universität Bochum, Germany — ³Experimentelle Physik IIIA, Technische Universität Dortmund, Germany

Photons from ideal single-photon sources exhibit quantum mechanical characteristics and therefore allow applications in novel fields including quantum cryptography and spintronics. One promising candidate for this task is the nitrogen-vacancy (NV) center in diamond. The main aim of this project is the fabrication and investigation of near-surface NV--centers in high-purity single-crystal diamond films. Preparation of these active elements is still challenging, especially when read-out is desired to be by optical as well as electronic means. In this work, pure single-crystal diamond films are homoepitaxially grown by microwave-plasma-assisted chemical vapor deposition, and the film quality is characterized. PL-measurements show, that the purity of these films surpasses the quality of commercially available electronic grade diamonds (N < 5 ppb) significantly. NV centers are created by ion implantation and their properties are investigated spectroscopically.