标题： 半导体波导中自发参量下转换的相位和幅度同时匹配 显示英文标题

标题： Simultaneous Matching of Phase and Amplitude for Spontaneous Parametric Down-conversion in Semiconductor Waveguides

摘要： 我们提出对$\chi^{(2)}_{xyz}$进行非均匀调制，通过模式相位匹配的半导体波导中的自发参量下转换显著提高光子对生成效率。 这种方法在横向方向实现振幅匹配，同时保持沿波导传播轴的相位匹配。 我们的分析预测其效率比最高效的非调制波导提高十倍，并且相对于仅相位匹配的波导，效率可提高多达13个数量级。 此外，我们探讨了使用振幅和相位匹配结构实现高效紧凑的双光子源的实现方法，该源可在通信频段内调谐。 显示英文摘要

摘要： We propose a non-uniform modulation of $\chi^{(2)}_{xyz}$ to significantly enhance photon pair generation efficiency via spontaneous parametric down-conversion in modal phase-matched semiconductor waveguides. This approach enables amplitude-matching in the transverse direction while preserving the phase-matching along the waveguide propagation axis. Our analysis predicts a tenfold efficiency increase in comparison to the most efficient non-modulated waveguide, and up to 13 orders of magnitude efficiency enhancements relative to solely phase-matched waveguides. Furthermore, we explore the implementation of a highly efficient compact twin-photon source, tunable across the communication band, using an amplitude- and phase-matched structure.