用非线性光学探测CrSBr中温度依赖的非辐射衰变通道
Probing temperature dependent non-radiative decay channels in CrSBr with nonlinear optics
- Southwest University of Science and Technology（西南科技大学）
- Friedrich Schiller University Jena（耶拿弗里德里希·席勒大学）
- University of Electronic Science and Technology of China（电子科技大学）
- University of Münster（明斯特大学）
- University of Chemistry and Technology Prague（布拉格化工大学）
- Argonne National Laboratory（阿贡国家实验室）
- University of Chicago（芝加哥大学）
- Massachusetts Institute of Technology（麻省理工学院）
- Abbe Center of Photonics, Friedrich Schiller University Jena（耶拿弗里德里希·席勒大学阿贝光子学中心）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
该研究通过非线性光学光谱结合线性光致发光，探测CrSBr在顺磁与反铁磁相中的光学响应，并利用三次谐波与光致发光温度依赖差异识别反铁磁相中非辐射复合通道的起始。
AI中文摘要：
在最近发现的层状磁性材料中，反铁磁体CrSBr因其稳定性、准一维晶体结构和直接近红外带隙而引起了相当大的关注。这些性质使其成为结合电学、磁学和光学测量的合适平台，从而用于研究不同磁相中的激子动力学和输运。在本工作中，我们通过结合非线性光学光谱（包括二次谐波产生、三次谐波产生和双光子光致发光）与线性光致发光测量，研究了CrSBr在其顺磁和反铁磁相中的光学响应。观察到三次谐波产生和光致发光强度的温度依赖性存在明显差异，这使我们能够识别反铁磁相中非辐射复合通道的出现。
英文摘要：
Among the recently discovered layered magnetic materials, the antiferromagnet CrSBr has attracted considerable interest thanks to its stability, quasi-one-dimensional crystal structure, and direct near-infrared band gap. These properties make it a suitable platform for combined electrical, magnetic, and optical measurements, and thus for studying exciton dynamics and transport across different magnetic phases. In this work, we investigate the optical response of CrSBr across its paramagnetic and antiferromagnetic phases by combining nonlinear optical spectroscopy, including second-harmonic generation, third-harmonic generation, and two-photon photoluminescence, with linear photoluminescence measurements. The observation of a clear difference in the temperature dependence of third-harmonic generation and photoluminescence intensities allows us to identify the onset of non-radiative recombination channels in the antiferromagnetic phase.
