Journal
PHYSICAL REVIEW B
Volume 99, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.99.075430
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Funding
- Army Research Laboratory Center for Distributed Quantum Information
- NSF Graduate Research Fellowships Program
- Deutsche Forschungsgemeinschaft [FL 997/1-1]
- NASA Space Technology Research Fellowship
- NSF Center for Ultracold Atoms (CUA)
- NSF Science-Technology Center for Integrated Quantum Materials
- NSF [DMR-1231319]
- Office of Science of the US Department of Energy
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We report on quantum emission from Pb-related color centers in diamond following ion implantation and high-temperature vacuum annealing. First-principles calculations predict a negatively charged Pb-vacancy (PbV) center in a split-vacancy configuration, with a zero-phonon transition around 2.4 eV. Cryogenic photoluminescence measurements performed on emitters in nanofabricated pillars reveal several transitions, including a prominent doublet near 520 nm. The splitting of this doublet, 5.7 THz, exceeds that reported for other group-IV centers. These observations are consistent with the PbV center, which is expected to have a combination of narrow optical transitions and stable spin states, making it a promising system for quantum network nodes.
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