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

doi:10.1088/1674-1056/acbf28

中国物理B ›› 2023, Vol. 32 ›› Issue (6): 64207-064207.doi: 10.1088/1674-1056/acbf28

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

Zhiyong Wang(王智勇)^1,†, Xiangru Wang(汪相如)¹, Anran Li(李岸然)², Kaiqiang Zhang(张开强)², Yukun Ji(纪玉坤)², and Mingyu Zhong(钟明玉)²

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

收稿日期:2022-10-24 修回日期:2023-02-19 接受日期:2023-02-27 出版日期:2023-05-17 发布日期:2023-05-29
通讯作者: Zhiyong Wang E-mail:zywang@uestc.edu.cn
基金资助:
Project supported by the 2021 Innovation capability enhancement project of small and medium-sized technologybased enterprises in Shandong Province of China (Grant No. 2021TSGC1043). We would like to thank Professor F. Nori for his helpful suggestions.

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

Zhiyong Wang(王智勇)^1,†, Xiangru Wang(汪相如)¹, Anran Li(李岸然)², Kaiqiang Zhang(张开强)², Yukun Ji(纪玉坤)², and Mingyu Zhong(钟明玉)²

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

Received:2022-10-24 Revised:2023-02-19 Accepted:2023-02-27 Online:2023-05-17 Published:2023-05-29
Contact: Zhiyong Wang E-mail:zywang@uestc.edu.cn
Supported by:
Project supported by the 2021 Innovation capability enhancement project of small and medium-sized technologybased enterprises in Shandong Province of China (Grant No. 2021TSGC1043). We would like to thank Professor F. Nori for his helpful suggestions.

1. 附件.pdf(326KB)

摘要/Abstract

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

Abstract: 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.

Key words: transverse spin, topological photonics, the spin Hall effect of light, spinoptics

中图分类号: (Waveguides, couplers, and arrays)

42.82.Et

42.50.Tx (Optical angular momentum and its quantum aspects) 42.25.Ja (Polarization) 42.25.Bs (Wave propagation, transmission and absorption)

Zhiyong Wang(王智勇), Xiangru Wang(汪相如), Anran Li(李岸然), Kaiqiang Zhang(张开强), Yukun Ji(纪玉坤), and Mingyu Zhong(钟明玉). Theoretical research on the transverse spin of structured optical fields inside a waveguide[J]. 中国物理B, 2023, 32(6): 64207-064207.

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

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

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