Dephasing of Strong-Field-Driven Excitonic Autler-Townes Doublets Revealed by Time- and Spectrum-Resolved Quantum-Path Interferometry

作者：Yaxin Liu, Bingbing Zhu, Shicheng Jiang, Shenyang Huang, Mingyan Luo, Sheng Zhang, Hugen Yan, Yuanbo Zhang, Ruifeng Lu, Zhensheng Tao · 发表于：Physical Review Letters · 年份：2024 · DOI：10.1103/physrevlett.133.026901 · 被引用次数：7 · 研究领域：Spectroscopy and Quantum Chemical Studies、Quantum optics and atomic interactions、Laser-Matter Interactions and Applications

Understanding dephasing mechanisms of strong-field-driven excitons in condensed matter is essential for their applications in quantum-state manipulation and ultrafast optical modulations. However, experimental access to exciton dephasing under strong-field conditions is challenging. In this study, using time- and spectrum-resolved quantum-path interferometry, we investigate the dephasing mechanisms of terahertz-driven excitonic Autler-Townes doublets in MoS_{2}. Our results reveal a dramatic increase in the dephasing rate beyond a threshold field strength, indicating exciton dissociation as the primary dephasing mechanism. Furthermore, we demonstrate nonperturbative high-order sideband generation in a regime where the driving fields are insufficient to dissociate excitons.