Regensburg 2016 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 69: Nanostructures at Surfaces: Dots, Particles, Clusters

O 69.9: Poster

Mittwoch, 9. März 2016, 18:15–20:30, Poster A

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. However, the biggest challenge for the implementation of this concept is maintaining the coherence of the quantum states for a sufficiently long time. One promising candidate for this task is the nitrogen-vacancy 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 close to the surface with good properties is a task which is not yet sufficiently accomplished, especially when read-out is desired to be by optical as well as electronical means. In this project the influence of diamond properties as well as structure and termination of the diamond surface on the spin centers is investigated. Pure single-crystal diamond films are homoepitaxially grown by microwave plasma assisted chemical vapor deposition and the film quality is characterized by standard methods. NV centers are produced by ion implantation and properties investigated spectroscopically.