Robust polaritons in magnetic monolayers of CrI 3
Robust polaritons in magnetic monolayers of CrI 3
复制标题
CrI 3 磁性单层中的鲁棒极化子
DOI：
10.1103/physrevb.108.l161402
复制
发表时间：
2023
影响因子：
3.7
通讯作者：
Zhumagulov Y
中科院分区：
文献类型：
--
作者：
Zhumagulov Y
我们表明，具有显著磁性能的强光-物质耦合机制可以在基于单层三碘化铬（）的系统中实现。这种二维材料结合了强结合的激子配合物和低于居里温度的铁磁有序。利用微观第一性原理计算，我们揭示了与万尼尔型和弗伦克尔型激子相对应的丰富的光学跃迁谱，包括那些含有有效负质量电子的激子。我们证明了不同极化的激子与平面微腔的光子模式有效杂交。由于特殊的选择规则，极化子模式在圆偏振中得到很好的分辨。激子的强光振强度和腔约束导致了大的Rabi分裂值，单个单层达到35 meV，极化子模式之间的巨大Zeeman分裂高达20 meV。这为磁极性应用提供了一个极好的平台。
We show that the regime of strong light-matter coupling with remarkable magnetic properties can be implemented in systems based on monolayers of chromium triiodide (). This two-dimensional material combines the presence of strongly bound excitonic complexes with ferromagnetic ordering below the Curie temperature. Using microscopic first-principles calculations, we reveal a rich spectrum of optical transitions corresponding to both Wannier- and Frenkel-type excitons, including those containing electrons with an effective negative mass. We show that excitons of different polarizations efficiently hybridize with a photonic mode of a planar microcavity. Due to the peculiar selection rules, polariton modes become well resolved in circular polarizations. The strong optical oscillator strength of excitons and cavity confinement leads to large values of the Rabi splitting, reaching 35 meV for a single monolayer and giant Zeeman splitting between polariton modes of up to 20 meV. This makesan excellent platform for magnetopolaritonic applications.