Photo-induced edge states in low-dimensional materials have attracted considerable attention due to the tunability of topological properties and dispersion. Specifically, graphene nanoribbons have been predicted to host chiral edge modes upon irradiation with circularly polarized light. Here, we present numerical calculations of time-resolved angle resolved photoemission spectroscopy and trRIXS of a graphene nanoribbon. We characterize pump-probe spectroscopic signatures of photo-induced edge states, illustrate the origin of distinct spectral features that arise from Floquet topological edge modes, and investigate the roles of incoming photon energies and finite core–hole lifetime in RIXS. With momentum, energy, and time resolution, pump-probe spectroscopies can play an important role in understanding the behavior of photo-induced topological states of matter.

由于拓扑特性和色散的可调性，低维材料中的光诱导边缘态引起了相当大的关注。具体而言，已经预测了石墨烯纳米带在圆偏振光照射下具有手性边缘模式。在这里，我们提出了石墨烯纳米带的时间分辨角分辨光发射光谱和trRIXS的数值计算。我们表征了光诱导边缘状态的泵浦探针光谱特征，阐明了由Floquet拓扑边缘模式引起的独特光谱特征的起源，并研究了RIXS中入射光子能量和有限的核孔寿命的作用。有了动量，能量和时间分辨率，