论文标题
激光写入片上波导中的按需多模光存储
On-demand multimode optical storage in a laser-written on-chip waveguide
论文作者
论文摘要
量子内存是大规模量子网络的基本构建块。带宽较大的按需光学存储，高模具容量和集成结构同时对实际应用至关重要。但是，这尚未得到证明。 Here, we fabricate an on-chip waveguide in a $\mathrm {^{151}Eu^{3+}:Y_2SiO_5}$ crystal with insertion losses of 0.2 dB, and propose a novel pumping scheme to enable spin-wave atomic frequency comb (AFC) storage with a bandwidth of 11 MHz inside the waveguide.基于此，我们使用AFC方案和使用自旋波AFC方案的100个时间模式的有条件按需存储来证明200个时间模式的存储。读取光场和参考光场之间的干扰可见性为$ 99.0 \％\ pm 0.6 \％$和$ 97 \％\％\ pm 3 \％$的AFC和Spin-Wave AFC存储，这表明了这种低单元，多模型和集成的存储设备的相干性质。
Quantum memory is a fundamental building block for large-scale quantum networks. On-demand optical storage with a large bandwidth, a high multimode capacity and an integrated structure simultaneously is crucial for practical application. However, this has not been demonstrated yet. Here, we fabricate an on-chip waveguide in a $\mathrm {^{151}Eu^{3+}:Y_2SiO_5}$ crystal with insertion losses of 0.2 dB, and propose a novel pumping scheme to enable spin-wave atomic frequency comb (AFC) storage with a bandwidth of 11 MHz inside the waveguide. Based on this, we demonstrate the storage of 200 temporal modes using the AFC scheme and conditional on-demand storage of 100 temporal modes using the spin-wave AFC scheme. The interference visibility between the readout light field and the reference light field is $99.0\% \pm 0.6\%$ and $97\% \pm 3\%$ for AFC and spin-wave AFC storage, respectively, indicating the coherent nature of this low-loss, multimode and integrated storage device.
