Erlangen 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 46: Nano-Optics I
Q 46.5: Vortrag
Donnerstag, 17. März 2022, 11:45–12:00, Q-H11
Preparation of germanium-vacancy centers in diamond for metrological applications — •Justus Christinck1,2, Franziska Hirt1,2, Helmuth Hofer1, Zhe Liu2,3, Markus Etzkorn2,3, Toni Dunatov4, Milko Jakšić4, Jacopo Forneris5,6,7, and Stefan Kück1,2 — 1Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany — 2Laboratory for Emerging Nanometrology (LENA), Braunschweig, Germany — 3Technische Universität Braunschweig, Braunschweig, Germany — 4Ruder Bošković Institute, Zagreb, Croatia — 5University of Torino, Torino, Italy — 6Istituto Nazionale di Fisica Nucleare (INFN), Torino, Italy — 7Istituto Nazionale di Ricerca Metrologica (INRiM), Torino, Italy
Germanium-vacancy (GeV-) centers in diamond are promising candidates for metrological applications of single-photon sources, e.g., the calibration of single-photon avalanche diode (SPAD) detectors. We present the successful generation of GeV-centers in bulk diamond and their metrological characterization in a confocal microscope setup. Acid bath treatment has been evaluated to significantly reduce the background luminescence from the sample surface, which lead to a higher single-photon purity of the sample's emission. The Focused Ion Beam (FIB) technique was used to mill solid immersion lenses (SILs) into the diamond surface. Compared to untreated GeV-centers, an increase in photon flux was detected from the GeV centers that were below a SIL, and a careful analysis of the single photon purity was performed. Further details will be presented at the conference.