The recent observations of exotic quantum phenomena in AV₃Sb₅ (A = K, Rb, Cs) kagome superconductors have attracted significant attention in materials physics. Here, we propose an innovative two-frequencies laser model for ultrafast control of transient structural distortions. Using first-principles density functional theory in conjunction with the perturbative regime of nonlinear phononics, we investigate the nonharmonic potential energy, the crystal lattice dynamics and the topological properties of CsV₃Sb₅. We find that driving two infrared-active phonons of different frequencies promotes the desired Raman phonon vibrations, in which the displacement of Sb atoms is closely related to superconductivity. We demonstrate that the dimensional crossover and the topological nontrivial to trivial state transition of superconductor CsV₃Sb₅ can be triggered by ultrafast optical control. This work can be applied to other layered quantum materials and provide guidance for experiments related to photoinduced topology and superconductivity.

最近对 AV ₃ Sb ₅ (A = K, Rb, Cs) kagome 超导体中奇异量子现象的观察引起了材料物理学界的极大关注。在这里，我们提出了一种创新的双频激光模型，用于超快控制瞬态结构变形。利用第一性原理密度泛函理论结合非线性声学的微扰机制，我们研究了 CsV ₃ Sb ₅的非谐波势能、晶格动力学和拓扑性质。我们发现驱动两个不同频率的红外活性声子会促进所需的拉曼声子振动，其中锑原子的位移与超导性密切相关。_{我们证明了超导体CsV 3} Sb ₅的维度交叉和拓扑非平凡到平凡状态的转变可以通过超快光控制来触发。这项工作可以应用于其他层状量子材料，并为光致拓扑和超导相关的实验提供指导。