Ultra-broadband MIR super absorber using all silicon metasurface of triangular doped nanoprisms

Abdelsalam, Mostafa; Swillam, Mohamed A.

doi:10.1038/s41598-022-18817-1

Cited by 13 publications

(9 citation statements)

References 19 publications

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“…The reflection spectrum will exhibit a very sharp drop for this specific wavelength. The resonance wavelength is very sensitive to changes of the effective index, which is very sensitive to changes of the refractive index of the surrounding medium [15][16][17][18][19][20][21][22][23] .…”

Section: Methodsmentioning

confidence: 99%

“…One of the most widely used approaches involves detecting the spectral shift of a resonant feature as the refractive index is varied. Different techniques have been introduced for the implementation of compact and portable sensors 6,7,8 . In this paper, we demonstrate the response of light with our design in the mid-infrared wavelength range (10 μm-16 μm) by optimization of the reflected wave.…”

Section: Introductionmentioning

confidence: 99%

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High sensitivity meta-surface plasmonic sensor

Mahmoud,

Maher,

Ghanim

et al. 2024

Silicon Photonics XIX

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Surface Plasmon Polariton resonant sensors (SPPs) have found wide-ranging applications, particularly for nanoscale sensing. The SPP dispersion is determined by the properties of a limited number of suitable metals and cannot be arbitrarily tuned. The proposed gas sensor is based on surface plasmon polariton manipulated in the metamaterial surface. The plasmonic sensor utilizes a metal-air interface to detect and analyze various substances and phenomena in the mid-infrared range. The utilization of the Mid-infrared (MIR) wavelength range offers numerous benefits across a wide range of applications, including chemical and biological detection. This paper introduces a metasurface composed of highly doped silicon that demonstrates a plasmonic effect in the mid-infrared wavelength range. Silicon has several benefits, including compatibility with CMOS technology and easy manufacturing utilizing traditional silicon fabrication techniques. In addition, operating in the mid-infrared (mid-IR) range and using doped silicon material enables the development of integrated plasmonic devices at the microscale. In this paper, a meta surface plasmonic grating is proposed for sensing and detecting the refractive index changes. In order to test the performance of the plasmonic sensor, a commercial Lumerical software based on finite difference time domain (FDTD) has been used. The suggested design shows high sensitivity at λ = 13.9807 μm and it can be used for gas sensing applications.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High sensitivity meta-surface plasmonic sensor

Mahmoud,

Maher,

Ghanim

et al. 2024

Silicon Photonics XIX

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“…Crystalline silicon has a low absorption coefficient [13], for light wavelengths in the nearinfrared region because it is an indirect bandgap material [14]. The absorption length 1/ increases from 10 m to around 3 mm in the wavelength range 800-1100 nm [15]. In this wavelength region, 36% of photons have energy greater than Si's bandgap [16].…”

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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“…Nanoantennas are used to absorb electromagnetic wave radiation especially unused part s of solar radiation (IR region) and the thermal radiation from objects and convert it to electric current and vice versa [4][5][6][7] Plasmonic nanoantennas, consisting of nanoscale gaps between neighboring metallic nanoparticles, have recently been of great interest due to their ability to support a highly efficient, localized surface Plasmon resonance (LSPR) which is an effect that produces noted peaks in extinction spectra, and highly confined electromagnetic fields [8][9][10]. The strong field enhancements make them play a crucial role in many technologies and applications, including sensing application of plasmonic in MIR senasing [11][12][13][14], super absorption [15][16][17][18], steering and focusing [19][20][21][22] Since silver and gold are used in most plasmonic devices, they can only provide high confinement when employed near their plasma frequency [6]. A long-standing objective in plasmonics research is the tunability of plasmon resonances.…”

Section: Introductionmentioning

confidence: 99%

Highly doped silicon plasmonic infrared nanoantennas for energy harvesting applications

Saad

Ghanim

Swillam

2023

Integrated Optics: Design, Devices, Systems and Applications VII

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Due to the high need for renewable energy on a worldwide scale, significant research ha s been done on how to use solar energy as a source of free and clean energy. The energy produced is mostly released as electromagnetic radiation with a spectral range of 0.2 to 3 m. New technologies are being developed to harvest this energy while overcoming the limitations of conventional PV devices. These new devices are called nano-antennas (rectenna). Nanoantennas are used to absorb electromagnetic wave radiation especially unused parts of solar radiation (IR region) and the thermal radiation from objects and convert it to electric current and vice versa. Here, a novel design of an "E"-shaped nano-antenna for energy harvesting is introduced and analyzed by using the three-dimensional (3D) finite-difference time-domain (FDTD) method. The key issue in the design of an “E"-shaped nano-antenna for energy harvesting is based on the excitation of surface plasmon polaritons (SPP) through the doped silicon arms of the E shape placed on an Al2O3 substrate to obtain wideband behavior in IR region. In this paper, doped silicon was used instead of noble metal as a plasmonic material with optical resonances in the infrared. The width and length of doped silicon arms are v aried to get the best performance. Doped nanocrystals (NCs) have received more attention lately because through doping the free carrier densities can be changed gradually and active tenability can be achieved.

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Ultra-broadband MIR super absorber using all silicon metasurface of triangular doped nanoprisms

Cited by 13 publications

References 19 publications

High sensitivity meta-surface plasmonic sensor

High sensitivity meta-surface plasmonic sensor

Optofluidic sensor for measuring water salinity

Highly doped silicon plasmonic infrared nanoantennas for energy harvesting applications

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