Independent phase modulation for quadruplex polarization channels enabled by chirality-assisted geometric-phase metasurfaces
Yueyi Yuan,Kuang Zhang,Badreddine Ratni,Qinghua Song,Xumin Ding,Qun Wu,Shah Nawaz Burokur,Patrice Genevet +7 more
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TLDR
The concept of chirality-assisted phase is introduced as a degree of freedom, which could decouple the two co-polarized outputs, and thus be an alternative solution for designing arbitrary modulated-phase metasurfaces with distinct wavefront manipulation in all four CP output channels.Abstract:
Geometric-phase metasurfaces, recently utilized for controlling wavefronts of circular polarized (CP) electromagnetic waves, are drastically limited to the cross-polarization modality. Combining geometric with propagation phase allows to further control the co-polarized output channel, nevertheless addressing only similar functionality on both co-polarized outputs for the two different CP incident beams. Here we introduce the concept of chirality-assisted phase as a degree of freedom, which could decouple the two co-polarized outputs, and thus be an alternative solution for designing arbitrary modulated-phase metasurfaces with distinct wavefront manipulation in all four CP output channels. Two metasurfaces are demonstrated with four arbitrary refraction wavefronts, and orbital angular momentum modes with four independent topological charge, showcasing complete and independent manipulation of all possible CP channels in transmission. This additional phase addressing mechanism will lead to new components, ranging from broadband achromatic devices to the multiplexing of wavefronts for application in reconfigurable-beam antenna and wireless communication systems.read more
Citations
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Generalized laws of reflection and refraction from transformation optics
Yadong Xu,Kan Yao,Huanyang Chen +2 more
TL;DR: In this article, a transformation media slab is derived as a meta-surface, producing anomalous reflection and refraction for all polarizations of incident light, based on transformation optics.
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Ahmed H. Dorrah,Federico Capasso +1 more
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Programmable Controls to Scattering Properties of a Radiation Array
Sijia Li,Yun Bo Li,Lei Zhang,Zhang Jie Luo,Bo Wen Han,Rui Qi Li,Xiang Yu Cao,Qiang Cheng,Tie Jun Cui +8 more
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Polarization-insensitive 3D conformal-skin metasurface cloak.
He-Xiu Xu,Guangwei Hu,Yanzhao Wang,Chaohui Wang,Mingzhao Wang,Shaojie Wang,Yongjun Huang,Patrice Genevet,Wei Huang,Cheng-Wei Qiu +9 more
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Generating Dual-Polarized Vortex Beam by Detour Phase: From Phase Gradient Metasurfaces to Metagratings
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References
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TL;DR: The design of the hologram integrates a ground metal plane with a geometric metasurface that enhances the conversion efficiency between the two circular polarization states, leading to high diffraction efficiency without complicating the fabrication process.