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SKM 2023 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 22: 2D Materials IV (joint session HL/CPP)

HL 22.10: Vortrag

Mittwoch, 29. März 2023, 12:15–12:30, POT 81

Optimized Irradiation Protocol for Quantum Sensors in Hexagonal Boron Nitride — •Paul Konrad1, Andreas Gottscholl1, Andreas Sperlich1, Igor Aharonovich2, and Vladimir Dyakonov11Experimental Physics 6, Julius-Maximilians-University of Würzburg, 97074 Würzburg — 2School of Mathematics and Physical Sciences, University of Technology Sydney, Ultimo, NSW 2007, Australia

Colour centres in solid-state materials show great potential in quantum information technology and sensing applications. The lately discovered negatively charged boron vacancy (VB) in hexagonal boron nitride (hBN)[1] has shown that the defect exhibits a spin-triplet ground state with spin-dependent photoluminescence. The system can be exploited in terms of its application as temperature, magnetic field, and pressure sensor [2,3] which extends the already known applications of e.g. NV-centers in diamond not only due to its 2D character but also by highly improved temperature sensing especially at low temperatures.

Here we present an irradiation protocol for creation of VB by nitrogen ions, leading to optimized spin relaxation parameters and therefore improving quantum metrology limits. We also present tremendous improvement of ODMR contrast showing hyperfine interaction on flakes of down to 80nm thickness.

[1] Gottscholl et al., Nat. Mat., 19, 5, 540 (2020).

[2] Gottscholl et al., Sci. Adv., 7 (14), eabf3630 (2021).

[3] Gottscholl et al., Nat. Commun., 12, 4480 (2021).

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