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HL: Fachverband Halbleiterphysik

HL 16: Focus Session: Quantum Emitters in 2D Semiconductors

HL 16.2: Hauptvortrag

Dienstag, 10. März 2026, 10:00–10:30, POT/0081

Deterministic single-photon emitters in 2D materials — •Ursula Wurstbauer — University of Münster, Germany

Single-photon emitters (SPEs) play a pivotal role as building blocks for quantum technologies. In two-dimensional (2D) materials, SPEs can deterministically be generated, externally manipulated and monolithically integrated. The properties of SPEs in atomically thin membranes are strongly dependent on the host materials and differ e.g. between TMDCs and hBN but also on the emitters origin, like defects, strain or moiré-potentials in twisted structures [1,2]. SPEs can be generated on-demand and on-chip with high lateral precision in the prototypical TMDC monolayer MoS2 by defect engineering utilizing focused helium ions [3]. These defect states in TMDCs interact with the electronic bands, whereas some defects in hBN show color center like behavior [1]. Following a general introduction, we focus on generation and characterization of rather monoenergetic SPEs in hBN by Argon ion irradiation [4]. We gratefully acknowledge A. R. Bhuiyan, R. Schmidt, A. Michaelis de Vasconcellos, R. Bratschitsch and Harry Mönig for fruitful collaboration. [1] S. Michaelis de Vasconcellos et al. Physica status solidi b259, 2100566 (2022). [2] M. Brotons-Gisbert, et al. MRS Bulletin 49, 914-931 (2024). [3] J. Klein et al. ACS Photonics, 8, 2, 669-677 (2021). [4] A. R. Bhuiyan et al.

Keywords: single photon emitter; 2D materials; hBN; TMD