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2D CrSBr Enables Magnetically Controllable Exciton-Polaritons in an Open Cavity
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-09-18 , DOI: 10.1002/adfm.202411589 Chun Li 1 , Chao Shen 2, 3 , Nai Jiang 2 , Kwok Kwan Tang 1 , Xinfeng Liu 4 , Jiaqi Guo 2 , Yin Liang 1 , Jiepeng Song 1 , Xinyi Deng 1 , Qing Zhang 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-09-18 , DOI: 10.1002/adfm.202411589 Chun Li 1 , Chao Shen 2, 3 , Nai Jiang 2 , Kwok Kwan Tang 1 , Xinfeng Liu 4 , Jiaqi Guo 2 , Yin Liang 1 , Jiepeng Song 1 , Xinyi Deng 1 , Qing Zhang 1
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2D van der Waals (vdW) layered materials exhibit significant exciton binding energy and versatile stacking options, making them ideal for room-temperature exciton-polariton devices used in low-threshold lasing, nonlinear optical switching, and quantum computing. However, most existing systems depend on external optical microcavities coupled with single monolayers, leading to limited controllability and increased costs. Here, external cavity-free vdW magnet CrSBr crystals are presented that feature magnetically controllable self-hybridized exciton-polaritons that remain stable up to room temperature. The ultrastrong exciton-photon coupling suppresses donor-, phonon-, and defect-related emissions. Furthermore, the exciton-polariton dispersion and emission spectra can be effectively controlled by adjusting the magnetic field, temperature, and CrSBr thickness. This vdW exciton-polariton material platform, demonstrating remarkable magnetic responsiveness in open cavity configurations under ambient conditions, paves the way for the development of compact, fast, and low-loss spin, quantum, and magneto-photonic devices.
中文翻译：
2D CrSBr 可在开腔中实现磁控激子极化激元
2D 范德华 （vdW） 层状材料具有显著的激子结合能和多种堆叠选项，使其成为用于低阈值激光、非线性光开关和量子计算的室温激子极化激元器件的理想选择。然而，大多数现有系统依赖于外部光学微腔与单层耦合，导致可控性有限并增加成本。本文介绍了无外腔 vdW 磁体 CrSBr 晶体，其特点是磁控自杂化激子-极化激化激元，在室温下保持稳定。超强激子-光子耦合抑制了与供体、声子和缺陷相关的发射。此外，通过调整磁场、温度和 CrSBr 厚度，可以有效地控制激子-极化激元色散和发射光谱。这种 vdW 激子极化激元材料平台在环境条件下的开腔配置中表现出卓越的磁响应性，为开发紧凑、快速和低损耗的自旋、量子和磁光子器件铺平了道路。
更新日期：2024-09-18
中文翻译：
2D CrSBr 可在开腔中实现磁控激子极化激元
2D 范德华 （vdW） 层状材料具有显著的激子结合能和多种堆叠选项，使其成为用于低阈值激光、非线性光开关和量子计算的室温激子极化激元器件的理想选择。然而，大多数现有系统依赖于外部光学微腔与单层耦合，导致可控性有限并增加成本。本文介绍了无外腔 vdW 磁体 CrSBr 晶体，其特点是磁控自杂化激子-极化激化激元，在室温下保持稳定。超强激子-光子耦合抑制了与供体、声子和缺陷相关的发射。此外，通过调整磁场、温度和 CrSBr 厚度，可以有效地控制激子-极化激元色散和发射光谱。这种 vdW 激子极化激元材料平台在环境条件下的开腔配置中表现出卓越的磁响应性，为开发紧凑、快速和低损耗的自旋、量子和磁光子器件铺平了道路。
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