Dispersion-engineered spin photonics based on folded-path metasurfaces

Fei Zhang; Hanlin Bao; Mingbo Pu; Yinghui Guo; Tongtong Kang; Xiong Li; Qiong He; Mingfeng Xu; Xiaoliang Ma; Xiangang Luo

doi:10.1038/s41377-025-01850-w

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Dispersion-engineered spin photonics based on folded-path metasurfaces

Original Articles

- Dispersion-engineered spin photonics based on folded-path metasurfaces
- Dispersion-engineered spin photonics based on folded-path metasurfaces
- LSA 2025年14卷第8期页码：2111-2120
- Affiliations：
  
  1.National Key Laboratory of Optical Field Manipulation Science and Technology, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
  2.State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
  3.College of Materials Sciences and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
  4.Research Center on Vector Optical Fields, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
- Author bio：
  
  Mingbo Pu (pmb@ioe.ac.cn)
  Xiangang Luo (lxg@ioe.ac.cn)
- Funds：
- DOI：10.1038/s41377-025-01850-w
  中图分类号：
- 收稿日期：2024-09-05，
  
  修回日期：2025-02-15，
  
  录用日期：2025-03-25，
  
  网络出版日期：2025-05-16，
  
  纸质出版日期：2025-08-31
- Accepted：
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Dispersion-engineered spin photonics based on folded-path metasurfaces[J]. LSA, 2025,14(8):2111-2120.

Zhang, F. et al. Dispersion-engineered spin photonics based on folded-path metasurfaces. Light: Science & Applications, 14, 2111-2120 (2025).
Dispersion-engineered spin photonics based on folded-path metasurfaces[J]. LSA, 2025,14(8):2111-2120. DOI： 10.1038/s41377-025-01850-w.

Zhang, F. et al. Dispersion-engineered spin photonics based on folded-path metasurfaces. Light: Science & Applications, 14, 2111-2120 (2025). DOI： 10.1038/s41377-025-01850-w.

摘要

Abstract

Spin photonics revolutionizes photonic technology by enabling precise manipulation of photon spin states

with spin-decoupled metasurfaces emerging as pivotal in complex optical field manipulation. Here

we propose a folded-path metasurface concept that enables independent dispersion and phase control of two opposite spin states

effectively overcoming the limitations of spin photonics in achieving broadband decoupling and higher integration levels. This advanced dispersion engineering is achieved by modifying the equivalent length of a folded path

generated by a virtual reflective surface

in contrast to previous methods that depended on effective refractive index control by altering structural geometries. Our approach unlocks previously unattainable capabilities

such as achieving achromatic focusing and achromatic spin Hall effect using the rotational degree of freedom

and generating spatiotemporal vector optical fields with only a single metasurface. This advancement substantially broadens the potential of metasurface-based spin photonics

extending its applications from the spatial domain to the spatiotemporal domain.

关键词

Keywords

references

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