High‐Efficiency Metasurface Emitters for Generating Arbitrarily Polarized Spatial Propagating Waves

Zhang, Tai Yi; Feng, Hui; Wang, Hai Lin; Zhang, Yan Kai; You, Zi Hua; Cui, Tie Jun

doi:10.1002/admt.202200267

Cited by 10 publications

(1 citation statement)

References 49 publications

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“…To solve this problem, a method combining propagation and geometric phases is proposed to decouple the correlation between phase shifts of LCP and RCP waves, so as to achieve two independent polarization channels, [38][39][40] which provides more degrees of freedom for controlling the CP waves and designing multifunctional metasurfaces. [41][42][43][44] Furthermore, by introducing the concept of chirality-assisted phase and synthesizing with propagation phase and geometric phase, metasurface can be designed to achieve completely independent wavefront manipulation in all four different CP channels in transmission. [45] However, all above mentioned works can only manipulate EM waves in the transmission space or reflection space.…”

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confidence: 99%

Spin‐ and Space‐Multiplexing Metasurface for Independent Phase Controls of Quadruplex Polarization Channels

Sun

Feng

Gou

et al. 2022

Advanced Optical Materials

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Spin‐decoupled metasurfaces can realize independent phase controls of two orthogonally circularly polarized (CP) waves, and hence have attracted much attention in recent years. However, all previously reported metasurfaces capable of simultaneously manipulating the transmission and reflection of CP waves can only achieve two decoupled polarization conversion channels. In this work, a spin‐ and space‐multiplexing metasurface is proposed, that can achieve independent phase controls of four different CP conversion channels, including two cross‐polarized transmission channels and two co‐polarized reflection channels. The performance of the metasurface is experimentally validated by multi‐channel independent holographic imaging. The results show that four independent holograms are realized in four CP conversion channels by only using a single metasurface, which can greatly improve the information capacity of the metasurfaces and make full use of polarization and space resources.

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confidence: 99%

Spin‐ and Space‐Multiplexing Metasurface for Independent Phase Controls of Quadruplex Polarization Channels

Sun

Feng

Gou

et al. 2022

Advanced Optical Materials

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Generic Vectorial Hologram Based on Simultaneous and Independent Amplitude and Phase Modulation of Orthogonal Polarization States via Single Completely Spin‐Decoupled Meta‐Particles

Chu,

Liu,

et al. 2023

Laser & Photonics Reviews

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Metasurfaces composed of subwavelength structure arrays provide a diverse and powerful platform for generation of complicated electromagnetic (EM) fields and wavefronts manipulation and have triggered an unprecedented research upsurge in electromagnetism with the development of computer‐generated holography (CGH). Different from conventional scalar holograms only containing amplitude and phase properties, a vectorial hologram that benefits from the maneuverability of polarization of EM fields exhibits more immeasurable application potential and is simultaneously regarded as an urgent requirement. In this work, assisted by single completely spin‐decoupled meta‐particles, which perfectly combine the functions of simultaneous and independent amplitude and phase modulation of orthogonal polarization states containing left‐ and right‐handed circularly polarized (LCP&RCP) components, a vectorial hologram induced through eigenstates degeneracy with the ability of encoding arbitrary polarization is proposed in the microwave region. As the proof of concept, eight distinct holograms with specified polarizations and six‐channel polarization‐multiplexed hologram display are fabricated and characterized, further showcaing the versatility of the approach for the customization of arbitraty polarization and integration of reconstructed patterns. With the advantages of multi‐controllability and ultra‐compactness, the constructed monolayer completely spin‐decoupled paradigm for vectorial regulation may find prospective application aspects in spin detection, target perception, multi‐channel data encryption, and many other related fields.

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3D Reconfigurable Vectorial Holography via a Dual‐Layer Hybrid Metasurface Device

Wang,

Pang,

2023

Laser & Photonics Reviews

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Metasurface‐based vectorial holography manifests itself as an advanced platform for large‐capacity information storage, holographic display, and cryptography. However, a convenient and effective reconfigurable vectorial hologram generation mechanism still remains a challenge. Here, a rotation‐driven reconfigurable vectorial holography scheme is developed via a dual‐layer hybrid metasurface device, in which radiation‐type and birefringent metasurfaces are cascaded hybridly. Thus, reconfigurable and highly customizable intensity and polarization response of holograms in the 3D space is achieved. Rotatable radiation‐type metasurface (RTM) serves as an incidence‐wavefront modulator to excite the non‐rotatable birefringent metasurface (BM). The gradient descent optimization inverse design method is introduced to achieve the high‐efficiency reconstruction of the Jones vector and Jones matrix distribution on both RTM and BM. On this basis, numerical analysis and experimental verification of 3‐D reconfigurable vectorial holography are demonstrated in the microwave region. This scheme implies a new paradigm for 3‐D reconfigurable vectorial holography and can lead to advances in high‐capacity optical display, switchable meta‐devices, and cryptography.

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High‐Efficiency Metasurface Emitters for Generating Arbitrarily Polarized Spatial Propagating Waves

Cited by 10 publications

References 49 publications

Spin‐ and Space‐Multiplexing Metasurface for Independent Phase Controls of Quadruplex Polarization Channels

Spin‐ and Space‐Multiplexing Metasurface for Independent Phase Controls of Quadruplex Polarization Channels

Generic Vectorial Hologram Based on Simultaneous and Independent Amplitude and Phase Modulation of Orthogonal Polarization States via Single Completely Spin‐Decoupled Meta‐Particles

3D Reconfigurable Vectorial Holography via a Dual‐Layer Hybrid Metasurface Device

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