论文标题
使用模态空间重叠的片上的双孔工程
Biphoton engineering using modal spatial overlap on-chip
论文作者
论文摘要
由自发参数下转换产生的光子对对于光学量子信息处理至关重要，其中双光子状态的质量对于性能至关重要。为了设计片上的双音波函数（BWF），通常调整泵信封函数和相位匹配函数，而模态场重叠被认为是感兴趣频率范围的常数。在这项工作中，通过在耦合的波导系统中利用模态耦合，我们探索模态磁场重叠，作为双向工程的新自由度。我们为片上几代的极化纠缠光子和预示的单个光子提供了设计示例。该策略可以应用于不同材料和结构的波导，为光子量子状态工程提供了新的可能性。
Photon pairs generated by spontaneous parametric down-conversion are essential for optical quantum information processing, in which the quality of biphoton states is crucial for the performance. To engineer the biphoton wavefunction (BWF) on-chip, the pump envelope function and the phase matching function are commonly adjusted, while the modal field overlap has been considered as a constant in the frequency range of interest. In this work, by utilizing modal coupling in a system of coupled waveguides, we explore the modal field overlap as a new degree of freedom for biphoton engineering. We provide design examples for on-chip generations of polarization entangled photons and heralded single photons, respectively. This strategy can be applied to waveguides of different materials and structures, offering new possibilities for photonic quantum state engineering.
