论文标题
几乎完美的两光子干扰硅光子芯片上的下连接器
Near perfect two-photon interference out a down-converter on a silicon photonic chip
论文作者
论文摘要
集成的纠缠光子对来源是启用大规模量子光子解决方案的关键要素，并解决了扩展和稳定性的挑战。 Here we report the first demonstration of an energy-time entangled photon-pair source based on spontaneous parametric down-conversion in silicon-based platform through an optically induced second-order ($χ^{(2)}$) nonlinearity, ensuring type-0 quasi-phase-matching of fundamental harmonic and its second-harmonic inside the waveguide.开发的来源显示，偶然的偶然比例为1635 $μ$ W泵功率的8个。值得注意的是，我们报告了两光子干扰，几乎完美的可见性为99.36 $ \ pm1.94 \％$ $，显示出高质量的光子纠缠而没有过多的背景噪声。这为需要在单芯片上集成各种建筑功能的量子技术开辟了新的视野。
Integrated entangled photon-pair sources are key elements for enabling large-scale quantum photonic solutions, and addresses the challenges of both scaling-up and stability. Here we report the first demonstration of an energy-time entangled photon-pair source based on spontaneous parametric down-conversion in silicon-based platform through an optically induced second-order ($χ^{(2)}$) nonlinearity, ensuring type-0 quasi-phase-matching of fundamental harmonic and its second-harmonic inside the waveguide. The developed source shows a coincidence-to-accidental ratio of 1635 at 8 of $μ$W pump power. Remarkably, we report two-photon interference with near-perfect visibility of 99.36$\pm1.94\%$, showing high-quality photonic entanglement without excess background noise. This opens a new horizon for quantum technologies requiring the integration of a large variety of building functionalities on single chips.
