Microwave metamaterials

Cui, Tie Jun

doi:10.1093/nsr/nwx133

Cited by 164 publications

(59 citation statements)

References 21 publications

(24 reference statements)

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“…In order to quantitatively analyze the difference between radiation patterns, we calculate the Euclidean distances between every two of the 16 radiation patterns and display them in a 16×16 distance matrix, as shown in Figure 2(c). The gray level of each pixel (m, n) indicates the relative distance between th and th radiation patterns; and the red pixels located at (16, 2), (9, 3), (8,4), (12,6), (13,7), and (14, 10) indicate zero distance, making it impossible to distinguish from each other. Please refer to Supplementary Information for detailed discussions on these duplicated digital states.…”

Section: Working Mechanism Of the Ddm Systemmentioning

confidence: 99%

“…Recently, the digital coding and programmable metamaterial has experienced rapid development and received wide attention from microwave [8][9][10][11][12] and terahertz wave [7,13,14] to acoustic frequency [15,16]. Some milestone works include Minkowski-fractal-shaped coding metamaterial to make broadband terahertz diffusion [6], anisotropic digital metamaterial to realize dual-functional performance under orthogonal polarizations [12,13], and tensor digital coding metasurface to produce highly efficient conversion from spatially propagating wave to surface wave [14]. It is important to remark that the digital coding description allows metamaterial and metasurface to be studied by digital signal processing methods to reach more flexible controls of EM waves in much easier processes [10,17].…”

Section: Introductionmentioning

confidence: 99%

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Direct Transmission of Digital Message via Programmable Coding Metasurface

et al. 2019

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In modern wireless communications, digital information is firstly converted to analog signal by a digital-analog convertor, which is then mixed to high-frequency microwave to be transmitted through a series of devices including modulator, mixer, amplifier, filter, and antenna and is finally received by terminals via a reversed process. Although the wireless communication systems have evolved significantly over the past thirty years, the basic architecture has not been challenged. Here, we propose a method to transmit digital information directly via programmable coding metasurface. Since the coding metasurface is composed of ‘0’ and ‘1’ digital units with opposite phase responses, the digital information can be directly modulated to the metasurface with certain coding sequences and sent to space under the illumination of feeding antenna. The information, being modulated in radiation patterns of the metasurface, can be correctly received by multiple receivers distributed in different locations. This method provides a completely new architecture for wireless communications without using complicated digital-analog convertor and a series of active/passive microwave devices. We build up a prototype to validate the new architecture experimentally, which may find promising applications where information security is highly demanded.

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Section: Working Mechanism Of the Ddm Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Direct Transmission of Digital Message via Programmable Coding Metasurface

et al. 2019

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“…This property enables the simple implementation of some key devices, such as tapers and power dividers/combiners. Moreover, flexibility and high-efficiency of the transition structure allow us to design a variety of efficient functional devices for microwave and THz applications [8][9][10][11][12][13][14][15][16][17]. In this work, a plasmonic power divider/combiner shown in Fig.…”

Section: Broadband Channel Domino Plasmonic Power Divider/combinermentioning

confidence: 99%

“…The unique ability of these spoof SPPs to mimic optical-frequency SPPs at much lower frequencies has opened novel routes for wave control at far-IR, THz, and microwave and arouses a research boom. More importantly, their physical properties can be engineered at will by tuning the geometrical parameters [7][8][9][10][11][12][13][14][15][16][17]. Recently, the versatility of these concepts has been substantially extended with the demonstration of a novel class of geometry-induced modes supported by an easy-tomanufacture periodic chain of metallic box-shaped elements protruding out of a metallic surface [the so-called domino spoof plasmons (DSPs)] [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Broadband Plasmonic Circuitry Enabled by Channel Domino Spoof Plasmons

Liu¹,

Li²,

Guo³

et al. 2019

PIER

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Building of compact plasmonic integrated circuits based on domino spoof plasmons (DSPs) is an important requirement and still a challenge. In this work, we report the first demonstration of two kinds of channel domino plasmonic circuitries, which consist of an easy-to-manufacture periodic chain of metallic box-shaped elements inside two finite metallic plates. We reveal that only the channel DSPs itself rather than the hybrid TE 10 and DSPs modes is supported in the part of the channel domino plasmonic waveguide with or without the metallic vias on both sides. Two channel domino plasmonic filters based on the efficient transition structures are designed, and the simulated Sparameters and near electric field distributions show excellent transmission performance in broadband. Utilizing the lateral insensitive property of these two channel DSPs, two kinds of broadband plasmonic power dividers/combiners are firstly implemented. Excellent transmission performance validates our optimizations and indicates that the proposed scheme can be easily extended to other bands. This work provides a new route for construction of deep-subwavelength DSP devices in application of high integration of microwave and terahertz circuits.

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“…Metamaterials are engineered composites consisting of tailored subwavelength meta-atoms (inclusions) for controlling wave phenomena at will. During the last two decades, metamaterials have attracted great interest from researchers working in different fields of physics, which has resulted in an important impact on fundamental science and the emergence of numerous fascinating concepts [1][2][3][4][5]. Nevertheless, there is no universal approach to the synthesis of arbitrary complex metamaterials, mainly due to the two following reasons.…”

Section: Introductionmentioning

confidence: 99%

Modular Analysis of Arbitrary Dipolar Scatterers

Asadchy

Tretyakov

2019

Phys. Rev. Applied

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Within the paradigm of metamaterials and metasurfaces, the electromagnetic properties of composite materials can be engineered by shaping or modulating their constituents, the so-called meta-atoms. Synthesis and analysis of complex-shaped meta-atoms with general polarization properties is a challenging task. In this paper, we demonstrate that the most general dipolar response of any small object can be conceptually decomposed into a set of basic fundamental polarization phenomena, which enables immediate all-direction characterization of the electromagnetic properties of arbitrary linear materials and metamaterials. The proposed platform for modular characterization is tested on several examples of bianisotropic and nonreciprocal meta-atoms. As a demonstration of the potential of this modular analysis, we use it to design a single-layer metasurface of vanishing thickness with unitary circular dichroism. The analysis approach developed in this paper is supported by a ready-to-use computational code and can be further extended to meta-atoms engineered for other types of wave interactions, such as in acoustics and mechanics.

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Microwave metamaterials

Cited by 164 publications

References 21 publications

Direct Transmission of Digital Message via Programmable Coding Metasurface

Direct Transmission of Digital Message via Programmable Coding Metasurface

Broadband Plasmonic Circuitry Enabled by Channel Domino Spoof Plasmons

Modular Analysis of Arbitrary Dipolar Scatterers

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