Magneto-optics in a van der Waals magnet tuned by self-hybridized polaritons
Magneto-optics in a van der Waals magnet tuned by self-hybridized polaritons
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DOI：
10.1038/s41586-023-06275-2
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发表时间：
2023-08-17
期刊：
影响因子：
64.8
通讯作者：
Menon, Vinod M.
中科院分区：
文献类型：
--
作者：
Dirnberger, Florian;Quan, Jiamin;Menon, Vinod M.
用光控制量子材料具有基础和技术重要性。通过利用光学腔中光和物质的强耦合1-3，最近的研究能够修改其一些最具决定性的特征4-6。在这里，我们研究了范德华磁体的磁光特性，即使在没有外腔镜的情况下，该磁体也支持光子和激子的强耦合。在这种材料中，层状磁性半导体CrSBr-出现的光-物质混合物（称为极化子）被证明可以显着增加磁、电子和光学特性之间相关性的光谱带宽，从而实现对所施加的磁场和磁振子的很大程度上可调谐的光学响应。我们的研究结果强调了范德华磁体中激子-光子自杂化的重要性，并激发了通过强光-物质耦合操纵量子材料特性的新方向。在层状磁性半导体 CrSBr 中，涌现的光-物质混合体（极化子）增加了磁、电子和光学特性之间相关性的光谱带宽，从而实现了对所施加的磁场和磁振子的很大程度上可调谐的光学响应。
Controlling quantum materials with light is of fundamental and technological importance. By utilizing the strong coupling of light and matter in optical cavities1-3, recent studies were able to modify some of their most defining features4-6. Here we study the magneto-optical properties of a van der Waals magnet that supports strong coupling of photons and excitons even in the absence of external cavity mirrors. In this material-the layered magnetic semiconductor CrSBr-emergent light-matter hybrids called polaritons are shown to substantially increase the spectral bandwidth of correlations between the magnetic, electronic and optical properties, enabling largely tunable optical responses to applied magnetic fields and magnons. Our results highlight the importance of exciton-photon self-hybridization in van der Waals magnets and motivate novel directions for the manipulation of quantum material properties by strong light-matter coupling.In the layered magnetic semiconductor CrSBr, emergent light-matter hybrids (polaritons) increase the spectral bandwidth of correlations between the magnetic, electronic and optical properties, enabling largely tunable optical responses to applied magnetic fields and magnons.