Dual‐Polarized Tri‐Channel Encrypted Holography Based on Geometric Phase Metasurface - Université Paris Nanterre Access content directly
Journal Articles Advanced Photonics Research Year : 2020

Dual‐Polarized Tri‐Channel Encrypted Holography Based on Geometric Phase Metasurface

Yue Wang
  • Function : Author
Chunsheng Guan
  • Function : Author
Haoyu Li
  • Function : Author
Xumin Ding
Kuang Zhang
  • Function : Author
Jinxiang Wang
  • Function : Author
Jian Liu
  • Function : Author
Qun Wu
  • Function : Author

Abstract

Metasurface‐based encrypted holography has drawn much attention recently due to its excellent ability in storing/displaying information with good security. To enhance the encryption security of metasurface holograms, multiplexing techniques, for which a large number of parameters need to be scanned to achieve the desired meta‐atoms, are highly demanded. Herein, a metasurface design scheme, which utilizes solely geometric phase elements to manipulate both co‐ and cross‐polarized reflected fields independently, is proposed. Using an improved weighted Gerchberg–Saxton (GSW), a holographic algorithm is proposed for 1‐bit phase, dual‐polarized tri‐channel encrypted metamirrors. Proof‐of‐concept prototypes are fabricated and experimental demonstrations are performed at microwave frequencies. Simulations and measurements are carried out to validate the proposed design, and the results agree well with the theoretical design scheme. Such dual‐polarized and tri‐channel encrypted metamirrors are appealing for applications in polarimetric imaging, information encryption/storage and beam splitting, shaping and steering.

Dates and versions

hal-04214287 , version 1 (21-09-2023)

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Yue Wang, Chunsheng Guan, Haoyu Li, Xumin Ding, Kuang Zhang, et al.. Dual‐Polarized Tri‐Channel Encrypted Holography Based on Geometric Phase Metasurface. Advanced Photonics Research, 2020, 1 (2), ⟨10.1002/adpr.202000022⟩. ⟨hal-04214287⟩
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