α-MoO_(3)超表面光的自旋霍尔效应  

Spin Hall effect of light in α-MoO_(3) metasurface

作　　者：崔潇尹 张强[1] CUI Xiaoyin;ZHANG Qiang(School of Physics and Electronic Engineering,Harbin Normal University,Harbin 150025,China)

机构地区：[1]哈尔滨师范大学物理与电子工程学院,黑龙江哈尔滨150025

出　　处：《高师理科学刊》2024年第12期56-63,共8页Journal of Science of Teachers'College and University

摘　　要：在亚波长尺度下,自旋-轨道相互作用对基本光学过程有强烈影响,是微纳光学中重要的物理效应,而光的自旋霍尔效应能够直接反映出自旋轨道相互作用的强弱,因而被广泛研究和关注.寻常光的自旋霍尔效应通常较弱,需要通过弱测量技术去观测,严重限制了光自旋霍尔效应的应用.研究了高斯光束照射在半无限MoO_(3)为基底的光栅结构MoO_(3)超表面时产生的光的自旋霍尔效应.超表面的加入极大地增强了光的自旋霍尔效应,展现出了较强的可调控性.此外,在该结构表面处不同自旋分量的光束出现了定向转移,进而使得某一自旋分量的反射率趋于零,从而出现了非对称的光子自旋霍尔效应.研究为光的自旋霍尔效应在精密探测、光场调控、光学模拟运算、显微成像等领域的应用提供了重要的理论支持.At the subwavelength scale,the spin-orbit interaction has a strong influence on basic optical processes and is an important physical effect in micro-and nanoscale optics.The spin Hall effect of light can directly reflect the strength of the spin-orbit interaction,thus receiving extensive research and attention.The spin Hall effect of ordinary light is usually weak,and needs to be measured using weak measurement techniques,which seriously limits the application of the spin Hall effect of light.The spin Hall effect of light generated by a Gaussian beam incident on a half-infinite MoO_(3)super surface with a grating structure as the substrate is studied.The addition of the super surface greatly enhances the spin Hall effect of light,showing strong tunability.Furthermore,the light beams of different spin components appear to be directed transferred at the surface of the structure,thereby causing the reflectance of one spin component to approach zero,resulting in an asymmetric photon spin Hall effect.The research provides important theoretical support for the application of the photon spin Hall effect in precision detection,optical field control,optical simulation calculation,and microscopic imaging.

关 键 词：α-MoO_(3) 超表面 自旋霍尔效应 

分 类 号：O59[理学—应用物理]