Liu DongXue, Liang ChengKang, Deng DongMei, Wang GuangHui, Zhang Li
Opt Express. 2022 Nov 7;30(23):41821-41831. doi: 10.1364/OE.475024.
We systematically study the spin Hall effect of light (SHEL) in chiral PT-symmetric metamaterials when Laguerre Gaussian beams (LG beams) are incident and discover that cross-polarization (r, r) and intrinsic orbital angular momentum (IOAM) result in an asymmetric splitting of left-spin circularly polarized (LCP) light and right-spin circularly polarized (RCP) light. Additionally, there are spin Hall shift peaks near |r | ≪ |r | (r and r are Fresnel reflection coefficients). Altering the topological charge number ℓ, the chiral parameter κ, the dimensionless frequency M, and the incident angle θ may also influence the asymmetric spin splitting and displacement peak. We believe that this research will provide new ways to manipulate and enhance the asymmetric spin splitting of light and provide new applications for spin photonic devices.
当拉盖尔高斯光束（LG光束）入射时，我们系统地研究了手性PT对称超材料中的光自旋霍尔效应（SHEL），发现交叉极化（r，r）和固有轨道角动量（IOAM）导致左旋圆偏振（LCP）光和右旋圆偏振（RCP）光的不对称分裂。此外，在|r | ≪ |r |（r和r为菲涅耳反射系数）附近存在自旋霍尔位移峰。改变拓扑电荷数ℓ、手性参数κ、无量纲频率M和入射角θ也可能影响不对称自旋分裂和位移峰。我们相信这项研究将为操纵和增强光的不对称自旋分裂提供新方法，并为自旋光子器件提供新应用。
