Spatially Multiplexing of Metasurface for Manipulating the Focused Trefoil and Cinquefoil Vector Light Field

Sun, Rui; Cheng, Chuanfu; Zeng, Xiangyu; Zhang, Yu; Gu, Manna; Liu, Chunxiang; Ma, Hong; Kong, Qian; Chen, Cheng

doi:10.3390/nano11040858

Cited by 4 publications

(2 citation statements)

References 25 publications

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“…The analytical integral along an ellipse path l in the above equation is unsolvable. For a simple understanding, we can make an analogy of the case to that of nanoslits arranged in a circular ring [20], in which, the integral along the circular path is the Bessel vortex beam of e i2σqβ J 2σq (k R) with the doughnut profile as Bessel function J 2σq •(k•R) of order 2σq; while for metasurfaces with nanoslits on multiple circular rings, the doughnut profile ψ (R) is related to the confluent hyper geometrical function 45,46], and the corresponding vortex beam is ψ (R)e i2σqβ . Although it is obvious that the integral along the ellipses in the above equation may have the different doughnut from the confluent hyper geometrical function…”

Section: Principles Of the Metasurface Design And Vector Beam Generat...mentioning

confidence: 99%

Design of Metasurface with Nanoslits on Elliptical Curves for Generation of Dual-Channel Vector Beams

Ren

Zeng

et al. 2021

Nanomaterials

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The manipulations of nanoscale multi-channel vector beams (VBs) by metasurfaces hold potential applications in various important fields. In this paper, the metasurface with two sets of nanoslits arranged on elliptic curves was proposed to generate the dual-channel focused vector beams (FVBs). Each set of nanoslits was composed of the in-phase and the out-of-phase groups of nanoslits to introduce the constructive interference and destructive interference of the output light field of the nanoslits, focusing the converted spin component and eliminating the incident spin component at the focal point. The two sets of nanoslits for the channels at the two focal points were interleaved on the same ellipses, and by setting their parameters independently, the FVBs in the two channels are generated under illumination of linearly polarized light, while their orders and polarization states of FVBs were controlled independently. The generation of the FVBs with the designed metasurfaces was demonstrated by the finite-difference time domain (FDTD) simulations and by the experimental verifications. The work in this paper is of great significance for the generation of miniaturized multi-channel VBs and for broadening the applications of metasurfaces.

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Section: Principles Of the Metasurface Design And Vector Beam Generat...mentioning

confidence: 99%

Design of Metasurface with Nanoslits on Elliptical Curves for Generation of Dual-Channel Vector Beams

Ren

Zeng

et al. 2021

Nanomaterials

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“…To tackle these, several efforts have been explored via manipulating frequency, angular, polarization, orbital angular momentum (OAM), direction, or spatial multiplexing. [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52] They are implemented using harmonic response, [33] chiral metaatoms, [34] phase-synthesis decoupling approach, [35][36][37][38] multilayer stacking, [39][40][41] interleaved compound element, [42][43][44] and digital meta-atoms, [45] surface impedance using tensor units, [46] superimposed scattered waves, [47,48] or a single-cell design approach. [49] These attempts have significantly expanded the channel capacity of functions; nevertheless, they are mostly confined to phase-only manipulations, and little work is reported combining AP control with the merits of multiplexing schemes.…”

Section: Introductionmentioning

confidence: 99%

Multichannel Metasurfaces with Frequency‐Direction Multiplexed Amplitude and Phase Modulations

Xu,

Wang

et al. 2023

Advanced Optical Materials

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Electromagnetic wave multiplexing within a compact ultrathin device is pivotal for high‐capacity communications, wireless power transfer, and other applications. Among them, the independent amplitude and phase (AP) control is necessary, and the decoupling of full‐space scattering channels such as reflection (R) and transmission (T) is favoured for high capacities of information processing. This is yet extremely challenging, even at a single frequency, because A and P are essentially correlated and the R‐T channels are usually coupled. Here, a triband multichannel metasurface is proposed and demonstrated, with a frequency‐direction multiplexed paradigm for on‐demand control of both AP across three independent R‐T channels. For practical realization with high efficiency, a judiciously engineered four‐layer compound meta‐atom is proposed. Such a sophisticated multiplexing can facilitate powerful capability in wavefront control and significantly enrich the capacity as well as degrees of freedom for design. For verification, a proof‐of‐concept metadevice has been devised and experimentally demonstrated at microwave frequency, showcasing transmissive and reflective dual‐vortex beams along x and y directions at 7 and 10.2 GHz, respectively, while transmissive dual focusing at 15.7 GHz. This strategy opens a new avenue for circularly‐polarized AP control toward the capacity limit of frequency and direction and for novel functional metadevices with high integration.

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Super-reflector enabled by non-interleaved spin-momentum-multiplexed metasurface

Kong

et al. 2023

Light Sci Appl

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Electromagnetic wave multiplexing, especially for that occurring at different incidences (spatial-frequency multiplexing), is pivotal for ultrathin multifunctional interfaces and high-capacity information processing and communication. It is yet extremely challenging based on passive and compact wave elements, since the wave excitation and scattering channels are exclusively coupled through gradient phases and hence momentum matching condition at the interface. Here, we propose a spin-momentum multiplexed paradigm called a super-reflector enabling on-demand control of both retroreflections and anomalous reflections using a non-interleaved single-celled metasurface. By multiplexing four channels connecting two spin states excited onto each input of three spatial frequencies, a total of twelve channels are engineered, among which three are retroreflected channels and the residual are anomalous reflection ones. Our compound multiplexed super-reflector allows five degrees of freedom in circular polarization Jones' matrix, approaching the intrinsic upper limit of such planar metasurface. The concept has been experimentally verified by a proof-of-concept super-reflector at microwave frequency, showcasing twelve reflected beams and a high efficiency exceeding 90.6% defined as the ratio of reflected power to incidence for each channel beam. Our strategy opens a new avenue for angle multiplexing and angle-resolved metadevices toward the capacity limit of 2D planar Jones’ matrix.

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Spatially Multiplexing of Metasurface for Manipulating the Focused Trefoil and Cinquefoil Vector Light Field

Cited by 4 publications

References 25 publications

Design of Metasurface with Nanoslits on Elliptical Curves for Generation of Dual-Channel Vector Beams

Design of Metasurface with Nanoslits on Elliptical Curves for Generation of Dual-Channel Vector Beams

Multichannel Metasurfaces with Frequency‐Direction Multiplexed Amplitude and Phase Modulations

Super-reflector enabled by non-interleaved spin-momentum-multiplexed metasurface

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