Regensburg 2022 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 19: Materials and Devices for Quantum Technology 1

HL 19.9: Talk

Wednesday, September 7, 2022, 12:15–12:30, H34

Large hBN single-photon emitter arrays fabricated by capillary assembly — •Johann Adrian Preuß, Eduard Rudi, Johannes Kern, Robert Schmidt, Rudolf Bratschitsch, and Steffen Michaelis de Vasconcellos — University of Münster, Institute of Physics and Center for Nanotechnology, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany

Convenient and readily available quantum light sources are a crucial building block for quantum photonic technologies. Recently, single-photon emitters have been discovered in hexagonal boron nitride (hBN), which efficiently emit single photons even at room temperature. Controlling the positioning of nanocrystals hosting these light emitters is an important technique for the bottom-up fabrication of functional nanostructures. Here, we demonstrate the fabrication of mm²-sized rectangular arrays formed by tens of thousands of hBN nanoplatelets [1]. Using capillary assembly, we arrange commercially available hBN nanopowder. Positioning yields of >95% are achieved on individual fields. We find stable and spectrally narrow quantum optical light emitters in 16% of the positions. Our preparation method opens the way for the combination of quantum light emitters in hBN with further fabrication steps for integrated photonic chips, which can provide thousands of single-photon sources at different emission energies.

[1] J. A. Preuß et al., 2D Materials 8, 035005 (2021)