A thin film lithium niobate near-infrared platform for multiplexing quantum nodes

Daniel Assumpcao; Dylan Renaud; Aida Baradari; Beibei Zeng; Chawina De-Eknamkul; C. J. Xin; Amirhassan Shams-Ansari; David Barton; Bartholomeus Machielse; Marko Loncar

doi:10.1038/s41467-024-54541-2

A thin film lithium niobate near-infrared platform for multiplexing quantum nodes

Daniel Assumpcao^*, Dylan Renaud^*, Aida Baradari, Beibei Zeng, Chawina De-Eknamkul, C. J. Xin, Amirhassan Shams-Ansari, David Barton, Bartholomeus Machielse, Marko Loncar^*

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Practical quantum networks will require multi-qubit quantum nodes. This in turn will increase the complexity of the photonic circuits needed to control each qubit and require strategies to multiplex memories. Integrated photonics operating at visible to near-infrared (VNIR) wavelength range can provide solutions to these needs. In this work, we realize a VNIR thin-film lithium niobate (TFLN) integrated photonics platform with the key components to meet these requirements, including low-loss couplers (<1 dB/facet), switches (>20 dB extinction), and high-bandwidth electro-optic modulators (>50 GHz). With these devices, we demonstrate high-efficiency and CW-compatible frequency shifting (>50% efficiency at 15 GHz), as well as simultaneous laser amplitude and frequency control. Finally, we highlight an architecture for multiplexing quantum memories and outline how this platform can enable a 2-order of magnitude improvement in entanglement rates over single memory nodes. Our results demonstrate that TFLN can meet the necessary performance and scalability benchmarks to enable large-scale quantum nodes.

Original language	English (US)
Article number	10459
Journal	Nature communications
Volume	15
Issue number	1
DOIs	https://doi.org/10.1038/s41467-024-54541-2
State	Published - Dec 2024

Funding

This work was supported in part by AFOSR FA9550-20-1-0105 (M.L., D.R.), AFOSR FA9550-19-1-0376 (M.L., A.S.A), ARO MURI W911NF1810432 (D.R., D.B., M.L.), NSF EEC-1941583 (M.L., D.A., C.X.), NSF OMA-2137723 (M.L., C.X.), OMA-2138068 (M.L., M. Y.), AWS Center for Quantum Networking\u2019s research alliance with the Harvard Quantum Initiative (M.L., D.A., D.R., C.X.), Ford Foundation Fellowship, (D.R.), and NSF GRFP No. DGE1745303 (D.R., D.A.). Device fabrication was performed at the Center for Nanoscale Systems (CNS), a member of the National Nanotechnology Coordinated Infrastructure Network (NNCI), which is supported by the National Science Foundation under NSF Grant No. 1541959.

ASJC Scopus subject areas

General Chemistry
General Biochemistry, Genetics and Molecular Biology
General Physics and Astronomy

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abstract = "Practical quantum networks will require multi-qubit quantum nodes. This in turn will increase the complexity of the photonic circuits needed to control each qubit and require strategies to multiplex memories. Integrated photonics operating at visible to near-infrared (VNIR) wavelength range can provide solutions to these needs. In this work, we realize a VNIR thin-film lithium niobate (TFLN) integrated photonics platform with the key components to meet these requirements, including low-loss couplers (<1 dB/facet), switches (>20 dB extinction), and high-bandwidth electro-optic modulators (>50 GHz). With these devices, we demonstrate high-efficiency and CW-compatible frequency shifting (>50% efficiency at 15 GHz), as well as simultaneous laser amplitude and frequency control. Finally, we highlight an architecture for multiplexing quantum memories and outline how this platform can enable a 2-order of magnitude improvement in entanglement rates over single memory nodes. Our results demonstrate that TFLN can meet the necessary performance and scalability benchmarks to enable large-scale quantum nodes.",

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AU - De-Eknamkul, Chawina

AU - Xin, C. J.

AU - Shams-Ansari, Amirhassan

AU - Barton, David

AU - Machielse, Bartholomeus

AU - Loncar, Marko

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A thin film lithium niobate near-infrared platform for multiplexing quantum nodes

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