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Related Experiment Video

Updated: May 6, 2026

Fabricating Metamaterials Using the Fiber Drawing Method

Fabricating Metamaterials Using the Fiber Drawing Method

Published on: October 18, 2012

Dispersion-engineered spin photonics based on folded-path metasurfaces.

Fei Zhang^1,2,3,4, Hanlin Bao^1,2,3, Mingbo Pu^5,6,7,8

¹National Key Laboratory of Optical Field Manipulation Science and Technology, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209, China.

Light, Science & Applications

|May 16, 2025

Summary

This summary is machine-generated.

We introduce a novel folded-path metasurface for advanced spin photonics, enabling independent control of light spin states. This breakthrough overcomes limitations in broadband decoupling and integration for optical field manipulation.

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Area of Science:

Optics and Photonics
Metamaterials
Spin Photonics

Background:

Spin photonics relies on precise manipulation of photon spin states.
Spin-decoupled metasurfaces are key for complex optical field control.
Existing metasurfaces face limitations in broadband decoupling and integration.

Purpose of the Study:

To propose a novel folded-path metasurface concept.
To enable independent dispersion and phase control of opposite spin states.
To overcome limitations in broadband decoupling and integration in spin photonics.

Main Methods:

Utilizing a folded-path metasurface concept with a virtual reflective surface.
Modifying the equivalent length of the folded path for dispersion engineering.
Leveraging the rotational degree of freedom for advanced optical control.

Main Results:

Achieved independent dispersion and phase control of two opposite spin states.
Demonstrated achromatic focusing and achromatic spin Hall effect.
Generated spatiotemporal vector optical fields using a single metasurface.

Conclusions:

The folded-path metasurface concept significantly advances spin photonics.
This approach overcomes previous limitations in broadband decoupling and integration.
Opens new possibilities for metasurface applications in the spatiotemporal domain.