AI 中文总结
研究利用全光路径检测铁磁拓扑磁振子绝缘体中边缘模式，通过磁电耦合机制实现参量放大，提出太赫兹泵浦-探测光谱协议及利用太赫兹腔的方案，为探测拓扑磁体和研究磁量子材料中的拓扑现象开辟新途径。
AI 中文摘要
拓扑磁振子绝缘体因其非平凡的体磁振子拓扑结构和支持无耗散传输的稳健手性边缘模式，成为低能自旋信息处理的有前景平台。虽理论模型预测了这些边缘态，但传统探针检测困难。本文提出全光路径检测铁磁拓扑磁振子绝缘体中的边缘模式，利用磁电耦合机制通过共振电磁驱动实现边缘磁振子的参量放大，研究二维范德瓦尔斯铁磁材料，展示了自旋相关有效电偶极矩导致的参量放大，提出太赫兹泵浦-探测光谱协议及利用太赫兹腔选择性耦合边缘模式的可能性，为探测拓扑磁体开辟了途径。
英文摘要
Topological magnon insulators (TMIs) have emerged as promising platforms for low-energy spin-based information processing, due to their non-trivial bulk magnon topology and robust, chiral edge modes that support dissipationless transport. Although theoretical models predict these edge states, direct experimental detection remains challenging due to their limited sensitivity to conventional probes. In this work, we propose an all-optical pathway to detect topological magnon edge modes in ferromagnetic TMIs. Our approach harnesses parametric amplification of edge magnons via resonant electromagnetic driving, enabled by magnetoelectric coupling mechanisms. We concentrate on two-dimensional van der Waals ferromagnetic materials on the honeycomb lattice with magnonic band gaps in the terahertz (THz) range. We show that a spin-dependent effective electric dipole moment, arising from dynamic charge fluctuations and consistent with the lattice symmetry up to next-nearest-neighbor interactions, gives rise to one-photon-two-magnon processes leading to parametric amplification. On this basis, we propose a THz pump-probe spectroscopy protocol in which edge modes are selectively amplified and subsequently detected in absorption. Furthermore, we discuss the possibility of using THz cavities, enabling selective coupling to edge modes while filtering out bulk contributions. These findings establish a route for probing topological magnets and open new avenues for experimental exploration of exotic topological phenomena in magnetic quantum materials.
