Lead-related quantum emitters in diamond

• Main Authors: Ciccarino, Christopher J. (Author), Flick, Johannes (Author), Sundararaman, Ravishankar (Author), Malladi, Girish (Author), Walsh, Michael (Author), Bakhru, Hassaram (Author), Narang, Prineha (Author), Trusheim, Matthew E (Contributor), Wan, Noel Heng Loon (Contributor), Chen, Kevin C. (Contributor), Bersin, Eric Alexander (Contributor), Lienhard, Benjamin (Contributor), Englund, Dirk R. (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science (Contributor), Massachusetts Institute of Technology. Research Laboratory of Electronics (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2019-03-26T13:56:02Z.
• Subjects: Article
• Online Access: Get fulltext

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.
U.S. Army Research Laboratory. Center for Distributed Quantum Information
National Science Foundation (U.S.). Graduate Research Fellowship Program
National Science Foundation (U.S.) (Grant DMR-1231319)
United States. National Aeronautics and Space Administration (Space Technology Research Fellowship)
MIT-Harvard Center for Ultracold Atoms MIT International Science and Technology Initiative