论文标题
使用定期推出的Niobate微孔谐振器朝着1％的单个光子非线性
Towards 1% single photon nonlinearity with periodically-poled lithium niobate microring resonators
论文作者
论文摘要
在光频率下开发量子光子电路方面，单光子非线性的缺失一直是一个主要的障碍。在本文中，我们演示了一种周期性的薄膜烯橙酸酯微孔谐振器锂（PPLNMR），该谐振器（PPLNMR）达到5,000,000％/w第二次谐波转化效率---与最先进的 - 通过访问其最大的$χ^{（2）$ tenor $ tenor $ d _ d _ cuast的访问，几乎增强了20倍。相应的单个光子耦合率$ g/2π$估计为1.2 MHz，这是一个重要的里程碑，因为它接近了社区中开发的最佳可用氯酸盐微孔子的耗散率$κ/2π$。使用定义为$ g/κ$的功绩图，我们的设备达到了1％的单个光子非线性。我们表明，通过对设备的进一步缩放，可以将单个光子非线性提高到可以体现光子阻滞效应的制度。
The absence of the single-photon nonlinearity has been a major roadblock in developing quantum photonic circuits at optical frequencies. In this paper, we demonstrate a periodically-poled thin film lithium niobate microring resonator (PPLNMR) that reaches 5,000,000%/W second harmonic conversion efficiency---almost 20-fold enhancement over the state-of-the-art---by accessing its largest $χ^{(2)}$ tensor component $d_{33}$ via quasi-phase matching. The corresponding single photon coupling rate $g/2π$ is estimated to be 1.2 MHz, which is an important milestone as it approaches the dissipation rate $κ/2π$ of best available lithium niobate microresonators developed in the community. Using a figure of merit defined as $g/κ$, our devices reach a single photon nonlinearity approaching 1%. We show that, by further scaling of the device, it is possible to improve the single photon nonlinearity to a regime where photon-blockade effect can be manifested.
