论文标题
散布石墨烯中的异常超快全光厅效应
Anomalous Ultrafast All-Optical Hall Effect in Gapped Graphene
论文作者
论文摘要
我们在六边形对称性的二维（2D）半导体中提出了一个超快的全光异常霍尔效应，例如Gapped石墨烯（GG），过渡金属二甲藻元素（TMDCS）和六边形的二甲硅烷基二色核苷（TMDCS）和六边形氮化物（H-BN）。为了诱导这种效果，该材料受到两个强场单光周期脉冲的序列：手性泵脉冲在几秒钟内通过探针脉冲在2D晶格的扶手椅方向上线性极化。由于拓扑共振的影响，第一个（泵）脉冲在系统中诱导了较大的手性（山谷极化），而第二个脉冲产生了异常霍尔电流的飞秒脉冲。提出的效果从根本上是自然界中最快的全光异常效果。它可以应用于经典和量子的超快速全光存储和信息处理。
We propose an ultrafast all-optical anomalous Hall effect in two-dimensional (2D) semiconductors of hexagonal symmetry such as gapped graphene (GG), transition metal dichalcogenides (TMDCs), and hexagonal boron nitride (h-BN). To induce such an effect, the material is subjected to a sequence of two strong-field single-optical-cycle pulses: a chiral pump pulse followed within a few femtoseconds by a probe pulse linearly polarized in the armchair direction of the 2D lattice. Due to the effect of topological resonance, the first (pump) pulse induces a large chirality (valley polarization) in the system, while the second pulse generates a femtosecond pulse of the anomalous Hall current. The proposed effect is the fundamentally the fastest all-optical anomalous Hall effect possible in nature. It can be applied to ultrafast all-optical storage and processing of information, both classical and quantum.
