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Multi-species optically addressable spin defects in a van der Waals material
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Multi-species optically addressable spin defects in a van der Waals material
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Multi-species optically addressable spin defects in a van der Waals material
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Journal Article
Multi-species optically addressable spin defects in a van der Waals material
2024
Overview
Optically addressable spin defects hosted in two-dimensional van der Waals materials represent a new frontier for quantum technologies, promising to lead to a new class of ultrathin quantum sensors and simulators. Recently, hexagonal boron nitride (hBN) has been shown to host several types of optically addressable spin defects, thus offering a unique opportunity to simultaneously address and utilise various spin species in a single material. Here we demonstrate an interplay between two separate spin species within a single hBN crystal, namely
S
= 1 boron vacancy defects and carbon-related electron spins. We reveal the
S
= 1/2 character of the carbon-related defect and further demonstrate room temperature coherent control and optical readout of both
S
= 1 and
S
= 1/2 spin species. By tuning the two spin ensembles into resonance with each other, we observe cross-relaxation indicating strong inter-species dipolar coupling. We then demonstrate magnetic imaging using the
S
= 1/2 defects and leverage their lack of intrinsic quantization axis to probe the magnetic anisotropy of a test sample. Our results establish hBN as a versatile platform for quantum technologies in a van der Waals host at room temperature.
The 2D material hBN hosts various optically addressable spin defects, promising for quantum technology applications. Here the authors report the co-existence of spin-1 and spin-1/2 defects in hBN, show their room temperature coherent control and optical readout, as well as cross-relaxation.
