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13 March 2024 Next generation quantum photonic technologies with integrated diamond membranes
Alexander High, Xinghan Guo
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Proceedings Volume PC12911, Quantum Computing, Communication, and Simulation IV; PC129110Z (2024) https://doi.org/10.1117/12.3009976
Event: SPIE Quantum West, 2024, San Francisco, California, United States
Abstract
The continued evolution of quantum technologies requires heterogenous material platforms for packaging, scalability, integration, and multiplexing. Here, we demonstrate direct bonding of single-crystal diamond membranes, a proven host of coherent qubits for networking and sensing, to a wide variety of materials including fused silica, sapphire, thermal oxide, and lithium niobate. We realize bonded films with thickness as low as 10 nanometers. TEM imaging reveals sub-nm interface regions between crystalline diamond and sapphire. We demonstrate compatibility with quantum photonics by realizing several varieties of integrated nanophotonic cavities with quality factors exceeding 20000. Additionally, the membranes allow us to significantly improve the coherence and microwave addressability of tin vacancy qubits, allowing us to achieve a coherent spin-photon interface at 4 Kelvin. The bonded diamond membranes and coherent qubits therein can be readily integrated into fully packaged quantum networking nodes.
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Alexander High and Xinghan Guo "Next generation quantum photonic technologies with integrated diamond membranes", Proc. SPIE PC12911, Quantum Computing, Communication, and Simulation IV, PC129110Z (13 March 2024); https://doi.org/10.1117/12.3009976
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KEYWORDS
Diamond
Quantum photonics
Crystals
Quantum electronics
Quantum interfaces
Quantum spin
Quantum technologies
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