Coherent Optical Memory Baesd on A Laser-written On-chip Waveguide

• URL: http://arxiv.org/abs/2008.12901v2
• Date: Fri, 4 Dec 2020 07:02:17 GMT
• Title: Coherent Optical Memory Baesd on A Laser-written On-chip Waveguide
• Authors: Tian-Xiang Zhu, Chao Liu, Liang Zheng, Zong-Quan Zhou, Chuan-Feng Li, Guang-Can Guo
• Abstract summary: coherent optical memory based on a type-IV waveguide fabricated on the surface of a rare-earth ion-doped crystal. Spin-wave atomic frequency comb storage is demonstrated inside the type-IV waveguide. The developed on-chip optical memory paves the way towards integrated quantum nodes.
• Score: 13.98223548679925
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum memory is the core device for the construction of large-scale quantum networks. For scalable and convenient practical applications, integrated optical memories, especially on-chip optical memories, are crucial requirements because they can be easily integrated with other on-chip devices. Here, we report the coherent optical memory based on a type-IV waveguide fabricated on the surface of a rare-earth ion-doped crystal (i.e. $\mathrm{Eu^{3+}}$:$\mathrm{Y_2SiO_5}$). The properties of the optical transition ($\mathrm{{^7}F{_0}\rightarrow{^5}D{_0}}$) of the $\mathrm{Eu^{3+}}$ ions inside the surface waveguide are well preserved compared to those of the bulk crystal. Spin-wave atomic frequency comb storage is demonstrated inside the type-IV waveguide. The reliability of this device is confirmed by the high interference visibility of ${97\pm 1\%}$ between the retrieval pulse and the reference pulse. The developed on-chip optical memory paves the way towards integrated quantum nodes.

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