Erlangen 2022 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 41: Nano-Optics
Q 41.5: Poster
Mittwoch, 16. März 2022, 16:30–18:30, P
Influence of sample preparation on the optical properties of NV centers in nanodiamonds — •Jana Bauer1,2, Justus Christinck1,2, Franziska Hirt1,2, Helmuth Hofer1, and Stefan Kück1,2 — 1Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany — 2Laboratory for Emerging Nanometrology (LENA), Braunschweig, Germany
Nitrogen vacancy (NV-) centers are promising candidates as single-photon emitters in quantum metrology, though a reproducible preparation of samples based on nanodiamonds containing NV centers is still a major challenge. Especially the single-photon purity is fundamentally influenced by the sample preparation. We present a preparation routine based on cover glasses cleaned in oxygen plasma and the ensuing application of the nanodiamond particles via spin coating. Atomic force microscope as well as confocal microscope measurements were performed to examine the samples. The correlation of data sets allowed the identification of clusters as well as the classification of the diamond particles regarding their position and their optical properties. A metrological characterization in terms of the single-photon purity, spectral distribution, and the recording of the count rate as a function of the excitation power was performed. A detailed evaluation will be shown at the conference.