Tian Jiahao, Liu Fang, Xiong Xiaotong, Huang Yidong
Department of Electronic Engineering, Tsinghua University, Beijing 100084, China.
Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing 100084, China.
Nanophotonics. 2024 Jul 12;13(20):3825-3833. doi: 10.1515/nanoph-2024-0191. eCollection 2024 Aug.
The free electron spin dynamics in Kapitza-Dirac (KD) effect had been studied theoretically in one-dimensional standing wave of EUV to X-ray laser with extremely high intensity, which is far beyond experimental realization. Here, we propose to achieve the free electron spin-dependent KD effect in two-dimensional triangular optical lattice with spatial inversion symmetry breaking, and the theoretical results reveal that laser with wavelength in visible or near-IR and five orders of magnitude decreased intensity could lead to obvious spin-dependent KD effect. This work provides the way to realize the free electron spin-dependent KD effect experimentally.
自由电子在极紫外到X射线激光的一维驻波中的自旋动力学已在理论上进行了研究，该驻波强度极高，远远超出了实验实现的范围。在此，我们提出在具有空间反演对称性破缺的二维三角光学晶格中实现自由电子自旋相关的卡皮察-狄拉克（KD）效应，理论结果表明，波长在可见光或近红外波段且强度降低五个数量级的激光可导致明显的自旋相关KD效应。这项工作为通过实验实现自由电子自旋相关的KD效应提供了途径。
