Ultra-narrow inhomogeneous spectral distribution of telecom-wavelength vanadium centres in isotopically-enriched silicon carbide

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Nature Communications. Springer. 2023, 14(1), 8448. eISSN 2041-1723. Available under: doi: 10.1038/s41467-023-43923-7
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Spin-active quantum emitters have emerged as a leading platform for quantum technologies. However, one of their major limitations is the large spread in optical emission frequencies, which typically extends over tens of GHz. Here, we investigate single V4+ vanadium centres in 4H-SiC, which feature telecom-wavelength emission and a coherent S  = 1/2 spin state. We perform spectroscopy on single emitters and report the observation of spin-dependent optical transitions, a key requirement for spin-photon interfaces. By engineering the isotopic composition of the SiC matrix, we reduce the inhomogeneous spectral distribution of different emitters down to 100 MHz, significantly smaller than any other single quantum emitter. Additionally, we tailor the dopant concentration to stabilise the telecom-wavelength V4+ charge state, thereby extending its lifetime by at least two orders of magnitude. These results bolster the prospects for single V emitters in SiC as material nodes in scalable telecom quantum networks.

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ISO 690CILIBRIZZI, Pasquale, Muhammad Junaid ARSHAD, Benedikt TISSOT, Nguyen Tien SON, Ivan G. IVANOV, Thomas ASTNER, Philipp KOLLER, Guido BURKARD, Michael TRUPKE, Cristian BONATO, 2023. Ultra-narrow inhomogeneous spectral distribution of telecom-wavelength vanadium centres in isotopically-enriched silicon carbide. In: Nature Communications. Springer. 2023, 14(1), 8448. eISSN 2041-1723. Available under: doi: 10.1038/s41467-023-43923-7
BibTex
@article{Cilibrizzi2023-12-19Ultra-69294,
  year={2023},
  doi={10.1038/s41467-023-43923-7},
  title={Ultra-narrow inhomogeneous spectral distribution of telecom-wavelength vanadium centres in isotopically-enriched silicon carbide},
  number={1},
  volume={14},
  journal={Nature Communications},
  author={Cilibrizzi, Pasquale and Arshad, Muhammad Junaid and Tissot, Benedikt and Son, Nguyen Tien and Ivanov, Ivan G. and Astner, Thomas and Koller, Philipp and Burkard, Guido and Trupke, Michael and Bonato, Cristian},
  note={Article Number: 8448}
}
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