Review: recent progress in metal-less metasurfaces and metamaterials

Desouky, Mai; Abdelsalam, Mostafa; Swillam, Mohamed A.

doi:10.1007/s00339-019-2514-z

Cited by 11 publications

(12 citation statements)

References 64 publications

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“…Metal-dielectric metasurfaces find common use in optical sensing and communication applications since they allow to shape optical spectra, wave-fronts and polarizations [1][2][3][4][5][6] . They can also be used to increase the light-matter interaction for strong absorption/emission [7][8][9][10] or non-linear effects 4,[11][12][13] , to create beam splitters 14,15 , selective reflectors 16,17 , holograms [18][19][20] , polarizers [21][22][23] and for various other applications such as chiral photonic structures and chemical sensors [24][25][26] . Metal-insulator-metal (MIM) metasurfaces are of particular importance since they can be monolithically integrated with electronics in the same layer stack [27][28][29] and benefit from readily available high-yield large-scale production technologies, such as Complementary-Metal-Oxide-Semiconductor (CMOS), enabling low-cost optoelectronic devices 30,31 .…”

Section: Design Of Cmos-compatible Metal-insulator-metal Metasurfacesmentioning

confidence: 99%

Design of CMOS-compatible metal–insulator–metal metasurfaces via extended equivalent-circuit analysis

Dorodnyy

Koepfli

Lochbaum

et al. 2020

Sci Rep

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Photonic metasurfaces compatible with large-scale production such as CMOS are of importance because they promise cointegration of electronics with photonics for detection, communication and sensing. The main challenges on the way of designing such metasurfaces are: (1) large variety of possible geometrical shapes of metasurface elements that makes finding the most appropriate shape difficult; (2) poor compatibility of available electronic layer stacks with photonics. In this paper we show how to address both of these challenges utilizing extended equivalent-circuit analysis. In a first step we classify the behavior of different metasurfaces using the equivalent circuit. We discover that metasurfaces that use inverted-dipole resonator type exhibit higher tolerance to dielectric spacer thickness, higher angular stability and have similar resonance quality-factor as other types. In the second step we utilize the equivalent-circuit scheme to efficiently optimize the parameters of inverted-dipole based metasurfaces for a layer stack such as given in a CMOS process. Finally, as an example we demonstrate how an inverted-cross structure can be adapted to a commercial 110 nm CMOS process with Al metal layers. We measured peak absorption above 90% at center wavelength around 4 µm with quality factor of approximately 5 and angular stability larger than 60°.

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Section: Design Of Cmos-compatible Metal-insulator-metal Metasurfacesmentioning

confidence: 99%

Design of CMOS-compatible metal–insulator–metal metasurfaces via extended equivalent-circuit analysis

Dorodnyy

Koepfli

Lochbaum

et al. 2020

Sci Rep

View full text Add to dashboard Cite

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“…These structures enhance the diffraction limit of conventional optical materials giving some optical phenomena such as negative refraction , so metamaterials can be considered perfect lenses enhancing the interaction between matter and light. Moreover, metamaterials are used in chiral imaging, cloaking, and concentrators [10][11][12][13][14][15]. The fractal metamaterial technology uses fractal structure to build the metamaterials.…”

Section: Introductionmentioning

confidence: 99%

Silicon-based, fractal metamaterial structure for IR broadband absorption

Mahmoud

Ghanim

Othman

et al. 2023

Silicon Photonics XVIII

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Over a century ago, the study of blackbody radiation led to the development of quantum mechanics. A blackbody is a perfect absorber, absorbing all the electromagnetic light that illuminates it. There is no radiation passing through it, and none is reflected. Now, "bodies" with high absorption qualities are very important in many disciplines of research and technology. Perfect absorbers, for example, can be utilized as photodetectors, thermal pictures, microbolometers, an d thermal photovoltaic solar energy conversion. The Mid-infrared (MIR) wavelength spectrum has numerous advantages in a variety of applications. One of these uses is chemical and biological detection. In this paper, a metasurface mid -IR absorber based on the fractal technology of a doped silicon geometry resonator to realize wideband cross-fractal formation is introduced. The structure exhibits a broadband absorption within a wide range of IR wavelength spectrum extending from 3 to 9 μm. The structure was based on the Sierpinski carpet where different building blocks were simulated to reach the highest absorption. It is shown that light coupling over a broad wavelength range to the proposed fractal metamaterial absorber structure is due to multiple resonance mechanisms at different wavelengths. The propo sed structure is CMOS-compatible. Moreover, this proposed design opens the door to the development of new silicon -based absorbers for different applications such as energy harvesting and photodetection.

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“…The same wavelength is used here but with the proposed materials. The selection of the silicon and silicon dioxide in our structure enhances the sensitivity due to the difference in the refractive index [22].…”

Section: Introductionmentioning

confidence: 99%

Optofluidic sensor for measuring water salinity

Shafaay

Ghanim

Kreta

et al. 2023

Optical Sensors 2023

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Water salinity analysis is critical for water quality monitoring and evaluation in order to guarantee water safety. Unregulated salinity may be harmful to human health, crops, industry, and the ecosystem. The salinity levels in water sources are constantly changing as a result of natural and anthropogenic ecological change. Exceeding specific salt levels might endanger human health, particularly through drinkable water. In this work, we present a simulation of an optofluidic sensor to measure the water's salinity. We built a design to measure the change in the refractive index in a microfluidic channel based on the dielectric grating. The generated design was modelled to alleviate the manufacturing process of the microfluidic sensor of the saline water. The design was optimized for the range of measurements of the refractive index of saline water by the selection of the material of the sensor.

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Review: recent progress in metal-less metasurfaces and metamaterials

Cited by 11 publications

References 64 publications

Design of CMOS-compatible metal–insulator–metal metasurfaces via extended equivalent-circuit analysis

Design of CMOS-compatible metal–insulator–metal metasurfaces via extended equivalent-circuit analysis

Silicon-based, fractal metamaterial structure for IR broadband absorption

Optofluidic sensor for measuring water salinity

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