@article{0fee13367aa64393b6a96bd25d48f403,
title = "Bottom-Up Synthesis of Single Crystal Diamond Pyramids Containing Germanium Vacancy Centers",
abstract = "Diamond resonators containing color-centers are highly sought after for application in quantum technologies. Bottom-up approaches are promising for the generation of single-crystal diamond structures with purposely introduced color centers. Here the possibility of using a polycrystalline diamond to grow single-crystal diamond structures by employing a pattern growth method is demonstrated. For, the possible mechanism of growing a single-crystal structure with predefined shape and size from a polycrystalline substrate by controlling the growth condition is clarified. Then, by introducing germanium impurities during the growth, localized and enhanced emission from fabricated pyramid shaped single-crystal diamonds containing germanium vacancy (GeV) color centers is demonstrated. Finally, linewidth of ∼500 MHz at 4 K from a single GeV center in the pyramid shaped diamonds is measured. The method is an important step toward fabrication of 3D structures for integrated diamond photonics.",
keywords = "bottom-up growth, diamond single crystal, germanium vacancy, MPCVD growth",
author = "Milad Nonahal and White, {Simon J.U.} and Blake Regan and Chi Li and Aleksandra Trycz and Sejeong Kim and Igor Aharonovich and Mehran Kianinia",
note = "Funding Information: The authors thank to Mark Lockrey for the assistance on EBSD, Johannes E. Froch for the assistance on EBL fabrication. The authors also thank Mika Westerhausen for his useful discussion on MPCVD growth process. The authors acknowledge the Australian Research Council (CE200100010) and the Asian Office of Aerospace Research and Development (FA2386‐20‐1‐4014) for the financial support. The authors would like to thank the ANFF UTS hub for access to their facilities. Funding Information: The authors thank to Mark Lockrey for the assistance on EBSD, Johannes E. Froch for the assistance on EBL fabrication. The authors also thank Mika Westerhausen for his useful discussion on MPCVD growth process. The authors acknowledge the Australian Research Council (CE200100010) and the Asian Office of Aerospace Research and Development (FA2386-20-1-4014) for the financial support. The authors would like to thank the ANFF UTS hub for access to their facilities. Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH.",
year = "2021",
month = jul,
doi = "10.1002/qute.202100037",
language = "English",
volume = "4",
journal = "Advanced Quantum Technologies",
issn = "2511-9044",
publisher = "Wiley-VCH Verlag GmbH & Co. KGaA",
number = "7",
}