Ono Takafumi, Tsujimoto Yoshiaki, Wakui Kentaro, Fujiwara Mikio
Program in Advanced Materials Science Faculty of Engineering and Design, Kagawa University, 2217-20 Hayashi-cho, Takamatsu, Kagawa, 761-0396, Japan.
JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.
Sci Rep. 2024 Jan 11;14(1):1051. doi: 10.1038/s41598-024-51311-4.
We demonstrate a pulsed operation of an entangled photon pair source that is based on a silicon ring resonator. Time-bin entangled photon pairs at telecommunication wavelengths are generated via spontaneous four-wave mixing, which is excited by a pulsed pump laser. The entanglement between the generated photon pair is analyzed by using asymmetric Mach-Zehnder interferometers followed by single-photon detectors, resulting in non-classical interference with a visibility exceeding a classical limit. The reason for the degradation of the interference visibility is discussed using the theoretical model with experimental parameters. Our experimental results show successful pulsed generation of entanglement, which represents an important step towards a synchronized quantum network based on silicon photonics.
我们展示了一种基于硅环谐振器的纠缠光子对源的脉冲操作。通过自发四波混频产生电信波长的时间-bin纠缠光子对，该过程由脉冲泵浦激光器激发。利用非对称马赫-曾德尔干涉仪和单光子探测器分析所产生光子对之间的纠缠，从而产生可见度超过经典极限的非经典干涉。使用包含实验参数的理论模型讨论了干涉可见度下降的原因。我们的实验结果表明成功实现了纠缠的脉冲产生，这是迈向基于硅光子学的同步量子网络的重要一步。
