Li Xing-Yun, Zhu Feng, Qin Lu, Zhang Jia-Shun, Ren Mei-Zhen, An Jun-Ming, Zhang Wei, You Li-Xing, Wang Zhen, Xu Xing-Sheng
Opt Express. 2018 Oct 29;26(22):29471-29481. doi: 10.1364/OE.26.029471.
We report two-photon interferences on a silica-on-silicon chip of Mach-Zehnder interferometer using telecommunication-band correlated photon pairs. The photon pairs were generated by spontaneous four-waving mixing process in a dispersion-shifted fiber. The integrated chip, which was fabricated by standard silica-on-silicon planar lightwave circuit technology, contained a Mach-Zehnder interferometer with a thermo-optic phase shifter. The insertion loss of the interferometer was less than 1 dB. We demonstrated two-photon interferences with both degenerate- and non-degenerate-frequency photon pairs on the Mach-Zehnder interferometer chip. A high fringe visibility was achieved in the interference with nondegenerate-frequency photons. Properties of quantum interference were demonstrated in the interference with degenerate-frequency photon pairs, which is an important way to manipulate the quantum state. These results show great potential of silica-on-silicon photonic chips in applications for the fiber-chip scheme in quantum networks.
我们报道了利用电信波段相关光子对，在硅基二氧化硅马赫-曾德尔干涉仪芯片上实现的双光子干涉。光子对由色散位移光纤中的自发四波混频过程产生。该集成芯片采用标准的硅基二氧化硅平面光波电路技术制造，包含一个带有热光移相器的马赫-曾德尔干涉仪。干涉仪的插入损耗小于1分贝。我们在马赫-曾德尔干涉仪芯片上，利用简并和非简并频率的光子对都演示了双光子干涉。在与非简并频率光子的干涉中实现了高条纹可见度。在与简并频率光子对的干涉中演示了量子干涉特性，这是操纵量子态的一种重要方式。这些结果表明，硅基二氧化硅光子芯片在量子网络的光纤-芯片方案应用中具有巨大潜力。
