Regensburg 2025 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 57: Quantum Dots and Wires: Optics II

HL 57.9: Vortrag

Freitag, 21. März 2025, 11:45–12:00, H13

Room-temperature single photon emitters in hexagonal boron nitrite coupled to an open optical cavitiy — •Anthony Ernzerhof, Lukas Lackner, Martin Esmann, Ivan Solovev, and Christian Schneider — Carl von Ossietzky Universität Oldenburg, Germany

Single photon emitters (SPEs) are a key component in photonic quantum technologies. Potential applications include secure communications and quantum metrology. Here, we present SPEs at room temperature (RT) based on hexagonal boron nitride (hBN) nano crystallites, which exhibit remarkable optical properties[1]. Our work focuses on the integration of these SPEs in an optical cavity with open access and full tunability. The cavity device allows to enhance the emitter performance via the Purcell effect, which significantly improves the emitter emission rate and source collection efficiency[2]. We discuss our technological approach towards engineering the open cavity yielding a flexible, transportable, compact and userfriendly opto-mechanically tunable emitter-cavity device, which, in principle, is of universal use beyond hBN based single photon sources. We further discuss challenges associated to the implementation of hBN nano-crystallites in such a cavity.

[1] Tran, T.et al. Quantum emission from hexagonal boron nitride monolayers. Nature Nanotech 11, 37-41 (2016). [2] Tobias Vogl et al. Compact Cavity-Enhanced Single-Photon Generation with Hexagonal Boron Nitride, ACS Photonics 6 (8), 1955-1962 (2019).

Keywords: Single Photon Emitters; Hexagonal Boron Nitride; Quantum Dots; Room Temperature; Cavity