90%效率的稀土晶体低损耗阻抗匹配腔光学存储
90%-Efficient Optical Storage in a Rare-Earth Crystal with a Low-Loss Impedance-Matched Cavity
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中文总结 AI 辅助
本研究在稀土晶体中利用阻抗匹配腔和低损耗设计，实现了90.1%的相干光脉冲存储效率，并指出限制因素为原子频率梳制备及色散响应。
中文摘要 AI 辅助
在稀土离子掺杂晶体中实现高效光学存储具有挑战性，因为其典型的光吸收较弱，这使得腔增强存储器对寄生腔内损耗高度敏感。在此，我们展示了基于Eu3+:Y2SiO5的阻抗匹配腔原子频率梳存储器中相干光脉冲的90.1(5)%存储效率。晶体的布儒斯特角配置和全低温法布里-珀罗腔将往返腔内损耗降低至0.37%。定量建模表明，进一步改进主要受限于原子频率梳的制备及其相关的色散响应，而非残余腔损耗，这确定了进一步接近单位效率的主要要求。
英文摘要
High-efficiency optical storage in rare-earth-ion-doped crystals is challenging because of their typically weak optical absorption,which makes cavity-enhanced memories highly sensitive to parasitic intracavity loss. Here we demonstrate a 90.1(5)% storage efficiency for coherent optical pulses in an impedance-matched cavity atomic-frequency-comb memory based on Eu3+:Y2SiO5. The Brewster-angle configuration of the crystal and fully cryogenic Fabry-Pérot cavity reduce the round-trip intracavity loss to 0.37%. Quantitative modeling shows that further improvement is limited primarily by AFC preparation and its associated dispersive response rather than by residual cavity loss,identifying the principal requirements for further approaching unity efficiency.
发表机构
- Southern University of Science and Technology（南方科技大学）
- International Quantum Academy, and Shenzhen Branch, Hefei National Laboratory（国际量子学院，合肥国家实验室深圳分院）
- Centre of Excellence for Quantum Computation and Communication Technology, Research School of Physics, Australian National University（澳大利亚国立大学量子计算与通信技术卓越中心物理研究学院）
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