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Tunable and Transferable Diamond Membranes for Integrated Quantum Technologies

[Image: see text] Color centers in diamond are widely explored as qubits in quantum technologies. However, challenges remain in the effective and efficient integration of these diamond-hosted qubits in device heterostructures. Here, nanoscale-thick uniform diamond membranes are synthesized via “smar...

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Detalles Bibliográficos
Autores principales: Guo, Xinghan, Delegan, Nazar, Karsch, Jonathan C., Li, Zixi, Liu, Tianle, Shreiner, Robert, Butcher, Amy, Awschalom, David D., Heremans, F. Joseph, High, Alexander A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8704172/
https://www.ncbi.nlm.nih.gov/pubmed/34894697
http://dx.doi.org/10.1021/acs.nanolett.1c03703
Descripción
Sumario:[Image: see text] Color centers in diamond are widely explored as qubits in quantum technologies. However, challenges remain in the effective and efficient integration of these diamond-hosted qubits in device heterostructures. Here, nanoscale-thick uniform diamond membranes are synthesized via “smart-cut” and isotopically ((12)C) purified overgrowth. These membranes have tunable thicknesses (demonstrated 50 to 250 nm), are deterministically transferable, have bilaterally atomically flat surfaces (R(q) ≤ 0.3 nm), and bulk-diamond-like crystallinity. Color centers are synthesized via both implantation and in situ overgrowth incorporation. Within 110-nm-thick membranes, individual germanium-vacancy (GeV(–)) centers exhibit stable photoluminescence at 5.4 K and average optical transition line widths as low as 125 MHz. The room temperature spin coherence of individual nitrogen-vacancy (NV(–)) centers shows Ramsey spin dephasing times (T(2)(*)) and Hahn echo times (T(2)) as long as 150 and 400 μs, respectively. This platform enables the straightforward integration of diamond membranes that host coherent color centers into quantum technologies.