McWilliam Amy, Cisowski Claire Marie, Bennett Robert, Franke-Arnold Sonja
School of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, UK.
Nanophotonics. 2021 Nov 15;11(4):727-736. doi: 10.1515/nanoph-2021-0528. eCollection 2022 Jan.
An electric field propagating along a non-planar path can acquire geometric phases. Previously, geometric phases have been linked to spin redirection and independently to spatial mode transformation, resulting in the rotation of polarisation and intensity profiles, respectively. We investigate the non-planar propagation of scalar and vector light fields and demonstrate that polarisation and intensity profiles rotate by the same angle. The geometric phase acquired is proportional to = + , where is the topological charge and is the helicity. Radial and azimuthally polarised beams with = 0 are eigenmodes of the system and are not affected by the geometric path. The effects considered here are relevant for systems relying on photonic spin Hall effects, polarisation and vector microscopy, as well as topological optics in communication systems.
沿非平面路径传播的电场可以获得几何相位。此前，几何相位已与自旋重定向相关联，并且独立地与空间模式变换相关联，分别导致偏振和强度分布的旋转。我们研究了标量和矢量光场的非平面传播，并证明偏振和强度分布以相同角度旋转。获得的几何相位与 = + 成正比，其中 是拓扑电荷， 是螺旋度。 = 0 的径向和角向偏振光束是该系统的本征模，不受几何路径的影响。这里考虑的效应与依赖于光子自旋霍尔效应、偏振和矢量显微镜以及通信系统中的拓扑光学的系统相关。
