We explore the use of ultracold atoms and molecules for quantum science and technology.

Our goals include the use of dipolar molecules, to realize new forms of quantum matter and gain insights into the foundations of molecular collisions and chemistry. Moreover, we study molecules that facilitate tabletop precision searches for new physics beyond the Standard Model of particle physics. Finally, we also develop compact experimental setups to manipulate single atoms and molecules for technological applications.

For more information about our research please visit: www.coldmolecules.at, opens an external URL in a new window

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Characteristics of quantum emitters in hexagonal boron nitride suitable for integration with nanophotonic platforms

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Single photon emitters in two-dimensional (2D) hexagonal boron nitride (hBN) are promising solid-state quantum emitters for photonic applications and quantum networks. Despite their favorable properties, it has so far remained elusive to determine the origin of these emitters. We focus on two different kinds of hBN samples that particularly lend themselves for integration with nanophotonic devices, multilayer nanoflakes produced by liquid phase exfoliation (LPE) and a layer engineered sample from hBN grown by chemical vapour deposition (CVD). We investigate their inherent defects and fit their emission properties to computationally simulated optical properties of likely carbon-related defects. Thereby we are able to narrow down the origin of emitters found in these samples and find that the C2CB defect fits our spectral data best. In addition, we demonstrate a scalable way of coupling LPE hBN to optical nanofibers that are directly connected to optical fibers. Our work brings us one step closer to specifying the origin of hBN's promising quantum emitters and sheds more light onto the characteristics of emitters in samples that are particularly suited for integration with nanophotonics. This knowledge will prove invaluable for novel nanophotonic platforms and may contribute towards the employment of hBN for future quantum technologies.

arXiv:2210.11099, opens an external URL in a new window

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