Metasurface Spatial Processor for Electromagnetic Remote Control

Achouri, Karim; Lavigne, Guillaume; Salem, Mohamed A.; Caloz, Christophe

doi:10.1109/tap.2016.2537369

Cited by 49 publications

(53 citation statements)

References 29 publications

(26 reference statements)

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“…Upon inspection of Eq. (25)(26)(27), we see that the presence of k y is related to the presence of χ yz ee and χ zy ee while χ zz ee is essentially related to k 2 y . It follows that the susceptibility components χ zy ee and χ yz ee are responsible for the asymmetric angular scattering of this metasurface [50].…”

Section: Reflection Symmetry-broken Mathematical Operationsmentioning

confidence: 74%

“…For such a metasurface, the relations between the components of tonsorial Green's functions and susceptibilities are given in Eqs. (25)(26)(27). The other Green's functions pertaining to TM polarization are not given here for the sake of brevity.…”

Section: Multi-operator Angle Multiplexed Spatial Analog Computationmentioning

confidence: 99%

“…In this way, the term k y does not vanish in Eq. (25)(26)(27), leading to a nonreciprocal (symmetry-broken) reflection behavior at normal incidence. Let us know look at an illustrative example in which a non-reciprocal metasurface possesses nonreciprocal feature through exhibiting zero-reflection with an odd symmetry around the boresight direction.…”

Section: Reflection Symmetry-broken Mathematical Operationsmentioning

confidence: 99%

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Generalized Optical Signal Processing Based on Multioperator Metasurfaces Synthesized by Susceptibility Tensors

et al. 2019

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This paper theoretically proposes a multichannel functional metasurface computer characterized by Generalized Sheet Transition Conditions (GSTCs) and surface susceptibility tensors. The study explores a polarization-and angle-multiplexed metasurfaces enabling multiple and independent parallel analog spatial computations when illuminated by differently polarized incident beams from different directions. The proposed synthesis overcomes substantial restrictions imposed by previous designs such as large architectures arising from the need of additional subblocks, slow responses, and most importantly, supporting only the even reflection symmetry operations for normal incidences, working for a certain incident angle or polarization, and executing only single mathematical operation. The versatility of the design is demonstrated in a way that an ultra-compact, integrable and planar metasurface-assisted platform can execute a variety of optical signal processing operations such as spatial differentiation and integration. It is demonstrated that a metasurface featuring nonreciprocal property can be thought of as a new paradigm to break the even symmetry of reflection and perform both even-and odd-symmetry mathematical operations at normal incidences. Numerical simulations also illustrate different aspects of multichannel edge detection scheme through projecting multiple images on the metasurface from different directions. Such appealing findings not only circumvent the major potential drawbacks of previous designs but also may offer an efficient, easy-to-fabricate, and flexible approach in wave-based signal processing, edge detection, image contrast enhancement, hidden object detection, and equation solving without any Fourier lens.

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Section: Reflection Symmetry-broken Mathematical Operationsmentioning

confidence: 74%

Section: Multi-operator Angle Multiplexed Spatial Analog Computationmentioning

confidence: 99%

Section: Reflection Symmetry-broken Mathematical Operationsmentioning

confidence: 99%

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Generalized Optical Signal Processing Based on Multioperator Metasurfaces Synthesized by Susceptibility Tensors

et al. 2019

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“…In order to overcome these limitations, all-dielectric metasurfaces have attracted particular interest recently; and some successful designs with low-losses, high overall efficiency, and various functionalities [10][11][12][13][14][15] were obtained in microwave and optical frequencies.…”

Section: International Journal Of Antennas and Propagationmentioning

confidence: 99%

Transmission Control of Electromagnetic Waves by Using Quarter-Wave Plate and Half-Wave Plate All-Dielectric Metasurfaces Based on Elliptic Dielectric Resonators

Yahyaoui

Rmili

Achouri

et al. 2017

International Journal of Antennas and Propagation

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We present the design of all-dielectric Quarter-Wave Plate (QWP) and Half-Wave Plate (HWP) metasurfaces based on elliptic dielectric resonators (EDRs) for the transmission control of electromagnetic waves over the frequency band 20-30 GHz. First, an extensive numerical analysis was realized by studying the effect of the resonators geometry (thickness and ellipticity) on the transmission of both -and -polarized waves. Then, based on the numerical analysis, we have realized and characterized experimentally both QWP and HWP all-dielectric metasurfaces.

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“…In addition, to further improve the performances of metasurfaces and avoid their ohmic losses, which may limit their use at higher frequencies, all-dielectric metasurfaces with low losses, high overall efficiency, and various functionalities [8][9][10][11][12][13][14][15][16] were developed for several microwave THz and optical applications. In all-dielectric metasurfaces, the main used scattering elements are dielectric resonators such as spheres, cubes, cylindrical/elliptical disks, and rods [7].…”

Section: Introductionmentioning

confidence: 99%

Chiral All-Dielectric Metasurface Based on Elliptic Resonators with Circular Dichroism Behavior

Yahyaoui

Rmili

2018

International Journal of Antennas and Propagation

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We present the design of a new microwave all-dielectric chiral metasurface with circular dichroism behavior based on elliptic dielectric resonators (EDRs). During the design procedure, we have first optimized numerically the effects of the main design parameters such as the resonator's size and orientation, as well as the size of the slot within them, on the metasurface transmission over the frequency band 10-20 GHz. Measurements on the final metasurface prototype have shown a large circular dichroism (Δ = 0 61 and Δ = 0 5) over two bands .05 GHz) with ellipticities close to 45°which means that the developed device can be used as a circular polarization filter and circular polarizer at microwave frequencies.

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Metasurface Spatial Processor for Electromagnetic Remote Control

Cited by 49 publications

References 29 publications

Generalized Optical Signal Processing Based on Multioperator Metasurfaces Synthesized by Susceptibility Tensors

Generalized Optical Signal Processing Based on Multioperator Metasurfaces Synthesized by Susceptibility Tensors

Transmission Control of Electromagnetic Waves by Using Quarter-Wave Plate and Half-Wave Plate All-Dielectric Metasurfaces Based on Elliptic Dielectric Resonators

Chiral All-Dielectric Metasurface Based on Elliptic Resonators with Circular Dichroism Behavior

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