Chip, Volume. 3, Issue 1, 100081(2024)

Solid-state quantum nodes based on color centers and rare-earth ions coupled with fiber Fabry–Pérot microcavities

Ruo-Ran Meng1...2,†, Xiao Liu1,2,†, Ming Jin1,2,3, Zong-Quan Zhou1,2,3,*, Chuan-Feng Li1,2,3,**, and Guang-Can Guo1,23 |Show fewer author(s)
Author Affiliations
  • 1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
  • 2CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
  • 3Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
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    High-performance optical quantum memories serving as quantum nodes are crucial for the distribution of remote entanglement and the construction of large-scale quantum networks. Notably, quantum systems based on single emitters can achieve deterministic spin–photon entanglement, which greatly simplifies the difficulty of constructing quantum network nodes. Among them, optically interfaced spins embedded in solid-state systems, as atomic-like emitters, are important candidate systems for implementing long-lived quantum memory due to their stable physical properties and robustness to decoherence in scalable and compact hardware. To enhance the strength of light-matter interactions, optical microcavities can be exploited as an important tool to generate high-quality spin–photon entanglement for scalable quantum networks. They can enhance the photon collection probability and photon generation rate of specific optical transitions and improve the coherence and spectral purity of emitted photons. For solid-state systems, open Fabry–Pérot cavities can couple single emitters that are not in proximity to the surface, avoiding significant spectral diffusion induced by the interfaces while maintaining the wide tunability, which enables addressing of multiple single emitters in the frequency and spatial domain within a single device. This review described the characteristics of single emitters as quantum memories with a comparison to atomic ensembles, the cavity-enhancement effect for single emitters and the advantages of different cavities, especially fiber Fabry–Pérot microcavities. Finally, recent experimental progress on solid-state single emitters coupled with fiber Fabry–Pérot microcavities was also reviewed, with a focus on color centers in diamond and silicon carbide, as well as rare-earth dopants.

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    Ruo-Ran Meng, Xiao Liu, Ming Jin, Zong-Quan Zhou, Chuan-Feng Li, Guang-Can Guo. Solid-state quantum nodes based on color centers and rare-earth ions coupled with fiber Fabry–Pérot microcavities[J]. Chip, 2024, 3(1): 100081

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    Paper Information

    Category: Research Articles

    Received: Jun. 7, 2023

    Accepted: Dec. 19, 2023

    Published Online: Jan. 23, 2025

    The Author Email: Zhou Zong-Quan (zq_zhou@ustc.edu.cn), Li Chuan-Feng (cfli@ustc.edu.cn)

    DOI:10.1016/j.chip.2023.100081

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