发表机构
College of Physics and Electronic Engineering, Shanxi University; Collaborative Innovation Center of Extreme Optics, Shanxi University（山西大学物理电子工程学院; 山西大学极端光学协同创新中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究针对超表面耦合Kagome界面，提出亚晶格选择性控制方案，通过$1:1:-2$图案实现高效自旋反转，保真度达0.999937，为光子界面态操控提供定量设计目标。
AI 中文摘要
光子界面态的相干操控要求控制场与其内部模式结构相匹配。我们在非线性非局域超表面附近由光子介导交换所激发的双组分Kagome晶格中研究这一要求。Dirac旋量揭示了为何均匀拉曼控制在领头阶无法耦合相反自旋、同谷的界面模式，即使它们的空间包络重合。一个$1:1:-2$的亚晶格图案消除了这一抵消，并在对角控制类中，在固定均方根振幅下最大化投影耦合。我们通过全布里渊区拓扑和完整晶格传播测试了这一控制方案。对于光滑、有能隙的界面，一个$720$维计算给出目标模式保真度$0.999937$，泄漏为$6.27\ imes10^{-5}$，在RMS驱动$0.04t$下。迹保持动力学给出了成功转换所需的独立存活条件。一个探索性的三维铌酸锂超胞以$0.373\%$的相对误差复现了复杂的寻址图案，并提供了非局域交换、衰减和电光频率转换矩阵。因此，模式分辨的控制原理给出了定量的电磁设计目标；完整的自旋相关器件实现仍需进一步校准。
英文摘要
Coherent manipulation of photonic interface states requires a control field that matches their internal mode structure. We study this requirement in a two-component Kagome lattice motivated by photon-mediated exchange near a nonlinear nonlocal metasurface. The Dirac spinors show why uniform Raman control cannot couple opposite-spin, same-valley interface modes at leading order, even when their spatial envelopes coincide. A $1:1:-2$ sublattice pattern removes this cancellation and maximizes the projected coupling at fixed root-mean-square amplitude within the diagonal-control class. We test this control scheme through full-zone topology and complete lattice propagation. For a smooth, gapped interface, a $720$-dimensional calculation gives target-mode fidelity $0.999937$ with leakage $6.27\times10^{-5}$ at RMS drive $0.04t$. Trace-preserving dynamics gives the separate survival condition needed for successful conversion. An exploratory three-dimensional lithium-niobate supercell reproduces the complex addressing pattern with $0.373\%$ relative error and provides nonlocal exchange, decay and electro-optic frequency-conversion matrices. The mode-resolved control principle thus gives quantitative electromagnetic design targets; the full spin-dependent device realization still requires further calibration.
