SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 25: Solid State Quantum Optics
Q 25.1: Vortrag
Mittwoch, 8. März 2023, 11:00–11:15, E001
Temperature annealing of hBN single-photon emitters in a nitrogen-rich atmosphere — •Nora Bahrami1,2, Pablo Tieben1,2, Janosch Stutenbaeumer1, and Andreas W. Schell1,2 — 1Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — 2Gottfried Wilhelm Leibniz Universität, Hannover, Germany
Single-photon emitters (SPEs) are becoming increasingly important due to their diverse use in quantum photonics, such as quantum communication and metrology. Especially hexagonal boron nitride (hBN), a two-dimensional semiconductor material, has recently gained interest because of its remarkable optical properties, such as bright emission at room temperature across the visible and near infrared spectral range owing to the large bandgap of 6 eV. Nevertheless the nature of this emission, i.e., its atomic origin, is still undefined and fluorescence bleaching is an unfortunate occurrence for integrated applications, where stable emission is significant for further research. Therefore we evaluate a recipe to enhance the spectral characteristics in hBN flakes by high temperature annealing in a nitrogen-rich atmosphere. Individual emitters were characterized and compared on certain areas via photoluminescence mapping and by the analysis of g(2) -, saturation- and lifetime measurements as well as emission spectra before and after annealing. Our research opens up another step towards improving the optical properties of hBN.