Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 55: Poster VI
Q 55.35: Poster
Donnerstag, 14. März 2024, 17:00–19:00, Tent B
Identifying Yellow Color-Centers in Hexagonal Boron-Nitride — •Pablo Tieben1,2 and Andreas W. Schell3 — 1PTB, Bundesallee 100, 38116 Braunschweig, Deutschland — 2LUH, Inst. f. Festkörperphysik, Appelstrasse 2, 30167 Hannover, Deutschland — 3JKU, Inst. f. Halbleiter und Festkörperphysik, Altenberger Str. 69, 4040 Linz, Österreich
Single photon emitters are an essential resource for the rapidly developing field of quantum technologies. Color centers in hexagonal boron nitride (hBN) pose a suitable system for single photon generation due to their bright and stable photon emission at room temperature. Due to the large bandgap of the material a plethora of emitters across the visible and near-infrared spectrum have been discovered. Some emitters exhibit intricate level structures with the possibility for advanced optical control. Recently the origin of emitters in the yellow spectral region have been tied to carbon related defects, but the exact atomic composition remains elusive. Based on previously found connections between the emission and excitation characteristics of these emitters, we perform additional spectroscopic measurements under simultaneous excitation with multiple wavelengths. We analyze the emission spectrum, photon flux and temporal emission stability as well as the second-order autocorrelation for fixed primary and varying secondary excitation wavelength. The dependency of these properties on the secondary wavelength can reveal additional information about the underlying level structure. Paired with theoretical predictions for different carbon defects the atomic origin can be narrowed down even further.
Keywords: single photons; quantum technologies; solid-state emitter; color centers