Reconfigurable beam steering metasurface absorbers

Martinez, Idellyse; Werner, Douglas H.

doi:10.1109/aps.2014.6905163

Cited by 14 publications

(18 citation statements)

References 7 publications

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“…We should note here that the applications of optical metasurfaces in the general sense of the word (i.e., patterned thin layers on a substrate) go beyond spatial wavefront manipulation. Thin light absorbers [79][80][81][82][83][84][85][86][87][88][89][90][91][92][93], optical filters [94][95][96][97][98][99][100][101][102][103][104][105][106], nonlinear [107][108][109][110][111][112][113][114], and anapole metasurfaces [115,116] are a few examples of such elements. This review is focused on applications of metasurfaces in wavefront manipulation, and therefore it doesn't cover these other types of metasurfaces.…”

Section: Recent Developmentsmentioning

confidence: 99%

A review of dielectric optical metasurfaces for wavefront control

et al. 2018

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During the past few years, metasurfaces have been used to demonstrate optical elements and systems with capabilities that surpass those of conventional diffractive optics. Here we review some of these recent developments with a focus on dielectric structures for shaping optical wavefronts. We discuss the mechanisms for achieving steep phase gradients with high efficiency, simultaneous polarization and phase control, controlling the chromatic dispersion, and controlling the angular response. Then we review applications in imaging, conformal optics, tunable devices, and optical systems. We conclude with an outlook on future potentials and challenges that need to be overcome. A. High-efficiency high-gradient phase controlSince high-contrast transmitarrays (HCA) are central to the most of the discussions of this section, we first briefly discuss their operation. We are primarily interested in the two-dimensional HCAs, and therefore we consider their case here, although much of the discussions are also valid for the one-dimensional case. In general, these devices are based on high-refractive-index dielectric nano-scatterers surrounded by low-index media [13, 38, 65, 67, 70-72, 76, 78]. The structure can be symmetric (i.e., with the substrate and capping layers having the same refractive indexes) [36] or asymmetric [66,67,76,78]. Depending on the materials and the required phase coverage, the thickness of the high-index layer is usually between 0.5λ 0 and λ 0 , where λ 0 is the free space wavelength. Typically, these structures are designed to be compatible with conventional microfabrication techniques;

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Section: Recent Developmentsmentioning

confidence: 99%

A review of dielectric optical metasurfaces for wavefront control

et al. 2018

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“…Several different devices comprising metamaterials and/or metasurfaces (including absorbers [5], WAIM coatings for phased array antennas [6], polarizers [7], and reconfigurable artificial magnetic conductors [11]) can be designed according to the above scheme simply by suitably defining the elementary blocks composing the synthesis procedures. In order to illustrate the required procedure to implement the MbD and SbD methodologies to metasurfaces and metamaterial design, two synthesis problems are considered in the following: the design of a multi-layer WAIM (Fig.…”

Section: A Review Of the Sbd Paradigmmentioning

confidence: 99%

“…As representative examples, SdDsynthesized metasurfaces and metamaterials have been designed to enhance the performances of absorbers [5], WAIM coatings for phased array antennas [6], and polarizers [7]. Moreover, suitable metamaterial lenses have been synthesized for extending the potentialities of standard array architectures [8]- [10].…”

Section: Introduction and Sbd Paradigmmentioning

confidence: 99%

Metasurface and metamaterial by design

Massa

Oliveri

2014

2014 International Radar Conference

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The synthesis of high-performance and complex electromagnetic devices is carried out through an innovative approach. The features of metasurfaces and metamaterials are exploited to design innovative field manipulation devices. More in detail, a set of instances of the System-by-Design paradigm are applied to the synthesis of metasurface and metamaterialenhanced electromagnetic devices in order to demonstrate the flexibility, modularity, and performance of the arising synthesis tools as well as of the obtained devices. Selected numerical examples are reported to give the readers some insights on the potentialities of the proposed synthesis framework.

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“…Metasurfaces are single-layer metamaterials with scatters judiciously placed in a 2-D pattern at a surface or interface [4]. Metasurface is an effective method to realize cloaks [5], lens [6], absorbers [7], surface plasmon polariton couplers [8] and polarizers [9] to manipulate the propagation of microwaves. Polarization is one of the most important properties of microwave, thus, big efforts have focused on the controlling of it.…”

Section: Introductionmentioning

confidence: 99%

Multi band polarization converter based on anisotropic metasurface

Shi

Zhang

et al. 2014

Proceedings of 2014 3rd Asia-Pacific Conference on Antennas and Propagation

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In this paper, a multi-band polarization converter using anisotropic metaurface is proposed. The unite cell of the anisotropic metaurface is mediated by electric-field-coupled (ELC) resonator. The proposed metasurface can converts the linearly polarized waves to its cross polarization at 7.83GHz and 10.22GHz. What's more, the designed metasurface can convert the linearly polarized waves to left handed circularly polarized waves at 7.76GHz and 10.54GHz, and convert the linearly polarized waves to right handed circularly polarized waves at 7.91GHz and 9.94GHz. The polarization conversion ratio (PCR) at 7.83GHz and 10.22GHz are more than 96%. The axial ratio at 7.76GHz, 7.91GHz, 9.94GHz and 10.54GHz are smaller than 1dB.

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Reconfigurable beam steering metasurface absorbers

Cited by 14 publications

References 7 publications

A review of dielectric optical metasurfaces for wavefront control

A review of dielectric optical metasurfaces for wavefront control

Metasurface and metamaterial by design

Multi band polarization converter based on anisotropic metasurface

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