发表机构
Hebei Normal University; Hebei University; Xingtai University（河北师范大学; 河北大学; 邢台学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究提出一种阿秒瞬态吸收光谱方案，以应变石墨烯为原型，通过ATAS的鱼骨结构作为应变的电子指纹，结合密度矩阵模拟与分析建模，实现量子材料晶格形变的超快准确重构。
AI 中文摘要
我们展示了一种用于重构二维材料中应变张量的阿秒瞬态吸收光谱（ATAS）方案。以应变石墨烯为原型系统，我们证明了ATAS中的鱼骨结构是应变的独特光谱指纹，其中应变诱导的范霍夫奇点的位移和分裂分别编码了应变张量的大小和取向。通过将密度矩阵模拟与分析建模相结合，我们建立了瞬态吸收光谱与应变张量之间的直接映射，能够从超快电子响应中准确提取晶格形变。我们的工作为超快应变计量引入了一种阿秒光谱范式，其中电子指纹取代了传统结构探针，用于量子材料中晶格形变的传感。
英文摘要
We demonstrate an attosecond transient absorption spectroscopy (ATAS) scheme for reconstructing strain tensors in two-dimensional materials. Using strained graphene as a prototype system, we show that the fishbone structures in ATAS serve as distinctive spectral fingerprints of strain, where strain-induced shifts and splittings of van Hove singularities encode the magnitude and orientation of the strain tensor, respectively. By combining density-matrix simulations with analytical modeling, we establish a direct mapping between transient absorption spectra and strain tensors, enabling accurate retrieval of lattice deformation from ultrafast electronic responses. Our work introduces an attosecond spectroscopic paradigm for ultrafast strain metrology, where electronic fingerprints replace conventional structural probes for sensing lattice deformation in quantum materials.
