Theoretical research on the transverse spin of structured optical fields inside a waveguide  

作　　者：王智勇 汪相如 李岸然 张开强 纪玉坤 钟明玉 Zhiyong Wang;Xiangru Wang;Anran Li;Kaiqiang Zhang;Yukun Ji;Mingyu Zhong(School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China;Jining Keli Photoelectric Industrial Co.LTD,Jining 272000,China)

机构地区：[1]School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China [2]Jining Keli Photoelectric Industrial Co.LTD,Jining 272000,China

出　　处：《Chinese Physics B》2023年第6期277-283,共7页中国物理B（英文版）

基　　金：Project supported by the 2021 Innovation capability enhancement project of small and medium-sized technologybased enterprises in Shandong Province of China (Grant No. 2021TSGC1043)。

摘　　要：Structured optical fields inside a waveguide possess the transverse spin, i.e., the spin angular momentum perpendicular to the direction of the waveguide. The physical origin of the transverse spin can be attributed to the presence of an effective rest mass of photons in guided waves, or equivalently, to the existence of a longitudinal field component, such that the transverse and longitudinal fields together form an elliptical polarization plane. In contrary to the traditional viewpoint, the transverse spin of photons in guided waves is also quantized, and its quantization form is related to the ellipticity of the polarization ellipse. The direction of the transverse spin depends on the propagation direction of electromagnetic waves along the waveguide, such a spin-momentum locking may have important applications in spin-dependent unidirectional optical interfaces. By means of a coupling between the transverse spin of guided waves and some physical degrees of freedom, one can develop an optical analogy of spintronics, i.e., spinoptics.

关 键 词：transverse spin topological photonics the spin Hall effect of light spinoptics 

分 类 号：O43[机械工程—光学工程]