Amplitude modulation of anomalously reflected terahertz beams using all-optical active Pancharatnam–Berry coding metasurfaces

Li, Jie; Zhang, Yating; Li, Jining; Yan, Xin; Liu, Liang; Zhang, Zhang; Huang, Jin; Li, Jiahui; Yang, Yanming; Yao, Jianquan

doi:10.1039/c9nr00675c

Cited by 125 publications

(40 citation statements)

References 43 publications

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“…Meanwhile, the theoretical design of the inverse scattering imaging based on the intelligent metasurface has been demonstrated as well. It could be expected that the proposed method could become an efficient tool for designing the intelligent metasurface holograms, and find its valuable applications in the future IoT [16,17], smart EM environment [18,19], and so on [20].…”

Section: Resultsmentioning

confidence: 99%

Work in Progress

Cui

2020

Proceedings of the 1st ACM International Workshop on Nanoscale Computing, Communication, and Applications

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Intelligent metasurfaces are information metasurfaces driven by artificial intelligence (AI), which are designed for manipulating the electromagnetic (EM) wavefront and/or the carried dataflow in programmable and smart ways, and thus hold important potentials in the modern society. However, the design of intelligent metasurface hologram, i.e., the information-carrying coding pattern on the metasurface, remains an open challenging problem due to the complicated EM coupling effects between the meta-atoms of metasurface, especially for the accurate manipulation of EM wave information. Here, starting from the fundamental Maxwell's three-dimensional (3D) full-vectorial integral equations, we present a discrete optimization algorithm to design the intelligent metasurface holograms, which allows us to generate the desirable EM holography with very high resolution and efficiency even with 1-bit phased-coded intelligent metasurface. Selected simulation and experimental results are provided to demonstrate the performance of the proposed strategy. The proposed method could be extended over the entire EM spectra and beyond in a straightforward manner, and could bring us important advances in various applications such as IoT, microscopy, security scanning, and so on.

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Section: Resultsmentioning

confidence: 99%

Work in Progress

Cui

2020

Proceedings of the 1st ACM International Workshop on Nanoscale Computing, Communication, and Applications

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“…Without considering sample fabrications as well as actual bias connections, programmable metasurfaces based on tunable components such as VO 2 , semiconductor germanium (Ge), and graphene have been proposed to demonstrate the feasibility of realizing real-time control and conversion of various functions. The attractive functions that have been implemented in the microwave band, like beam splitting and deflection [115], amplitude control [116], focus shifting [117], and space-time modulation [118], have also been theoretically and numerically verified for terahertz waves. However, theoretical analyses and simulations are not enough; only through practical measurements can terahertz programmable metasurface be proven with authenticity and practicability.…”

Section: Programmable Metasurfacesmentioning

confidence: 99%

Terahertz Metasurfaces: Toward Multifunctional and Programmable Wave Manipulation

et al. 2020

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Metasurfaces, composed of prearranged artificial unit cells possessing different electromagnetic (EM) responses, provide unprecedented abilities to realize versatile wave manipulations. Especially in the terahertz spectrum, metasurfaces attract broad attention by opening up further possibilities for wave regulating. Terahertz applications in various fields, for instance, spatial light modulation (SLM), radar, imaging, time-domain spectroscopy (TDS), and high-speed communication, have been facilitated and improved. In this article, we first give a simple review on recent advances on terahertz metasurfaces, including discussion of passive metasurfaces with fixed structures and active metasurfaces integrated with tunable components. Then, we briefly review the development of coding metasurfaces and programmable metasurfaces represented by digitized bits. We mainly focus on some powerful functions, functional multiplexing, and real-time controlled applications in terahertz frequencies. Finally, we give an abbreviated overview of developing terahertz multifunctional metasurfaces and programmable metasurfaces.

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“…With the development of nanofabrication technologies, metasurfaces consisting of arrays of plasmonic or dielectric nanoantennas have attracted enormous interest due to their ability to arbitrarily tailor the fundamental properties of the electromagnetic wavefront such as amplitude [10][11][12], phase [13][14][15][16][17], frequency [18,19], polarization [20][21][22] and orbital angular momentum (OAM) [23][24][25] within ultrashort distance. Meanwhile, simultaneously multiple parameters modulation methods have also been demonstrated [26][27][28][29][30], which make metasurface become a potential substitute for the traditional bulky optical elements.…”

Section: Introductionmentioning

confidence: 99%

Recent advances in multi-dimensional metasurfaces holographic technologies

2020

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Holography has attracted tremendous interest due to its capability of storing both the amplitude and phase of light field and reproducing vivid three-dimensional scenes. However, the large pixel size, low resolution, small field-of-view (FOV) and limited space-bandwidth of traditional spatial light modulator (SLM) devices restrict the possibility of improving the quality of reconstructed images. With the development of nanofabrication technologies, metasurfaces have shown great potential in manipulating the amplitude, phase, polarization, frequency or simultaneously multiple parameters of output light in ultrashort distance with subwavelength resolution by tailoring the scattering behaviour of consisted nanostructures. Such flexibilities make metasurface a promising candidate for holographic related applications. Here, we review recent progresses in the field of metasurface holography. From the perspective of the fundamental properties of light, we classify the metasurface holography into several categories such as phase-only holography, amplitude-only holography, complex amplitude holography and so on. Then, we introduce the corresponding working principles and design strategies. Meanwhile, some emerging types of metasurface holography such as tunable holography, nonlinear holography, Janus (or directional related) and bilayer metasurfaces holography are also discussed. At last, we make our outlook on metasurface holography and discuss the challenges we may face in the future.

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Amplitude modulation of anomalously reflected terahertz beams using all-optical active Pancharatnam–Berry coding metasurfaces

Abstract: Optical active Pancharatnam–Berry coding metasurfaces for amplitude modulation of terahertz beams.

Cited by 125 publications

References 43 publications

Work in Progress

Work in Progress

Terahertz Metasurfaces: Toward Multifunctional and Programmable Wave Manipulation

Recent advances in multi-dimensional metasurfaces holographic technologies

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