Design considerations of super-directive nanoantennas for core-shell nanowires

Ghanim, AbdelRahman M.; Hussein, Mohamed; Hameed, Mohamed Farhat O.

doi:10.1364/josab.35.000182

Cited by 29 publications

(18 citation statements)

References 35 publications

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“…The suggested doped silicon nanorod antenna can be fabricated using electron-beam lithography (EBL) 10 , 21 . Lithography is one of the most straightforward methods for fabricating nanostructures since it provides excellent repeatability as well as the capacity to create nanostructures of complex forms using a combination of lithographic techniques.…”

Section: Methodsmentioning

confidence: 99%

Giant localized electromagnetic field of highly doped silicon plasmonic nanoantennas

Alsayed

Ghanim

Yahia

et al. 2023

Sci Rep

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In this work, we present the analysis and design of an efficient nanoantenna sensor based on localized surface plasmon resonance (LSPR). A high refractive index dielectric nanostructure can exhibit strong radiation resonances with high electric field enhancement inside the gap. The use of silicon instead of metals as the material of choice in the design of such nanoantennas is advantageous since it allows the integration of nanoantenna-based structures into integrated-optoelectronics circuits manufactured using common fabrication methods in the electronic industry. It also allows the suggested devices to be mass-produced at a low cost. The proposed nanoantenna consists of a highly doped silicon nanorod and is placed on a dielectric substrate. Different shapes and different concentrations of doping for the nanoantenna structures that are resonant in the mid-infrared region are investigated and numerically analyzed. The wavelength of the enhancement peak as well as the enhancement level itself vary as the surrounding material changes. As a result, sensors may be designed to detect molecules via their characteristic vibrational transitions. The 3D FDTD approach via Lumerical software is used to obtain the numerical results. The suggested nanoantennas exhibit ultra-high local field enhancement inside the gap of the dipole structure.

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Section: Methodsmentioning

confidence: 99%

Giant localized electromagnetic field of highly doped silicon plasmonic nanoantennas

Alsayed

Ghanim

Yahia

et al. 2023

Sci Rep

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“…The reflector, the director, and driver of the antenna are located on the plane with the same high dielectric substrate so that the surface waves produced by the antenna are focused on the end-fire direction. This antenna design is in the sense that reflector on the back of the driven element is utilized to emit back the radiation from the backside to the forward direction [19]. In other words, the reflector element helps to diminish the surface wave traveling to the backside direction.…”

Section: The Optimized Designmentioning

confidence: 99%

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2020

Int J Electron Device Phys

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This paper was undertaken to study the influence upon gain and directional characteristics caused by numerous array of elements when used in conjunction with the Yagi antenna. Antennas are beneficial for a wide range of applications such as point to point communication, radio broadcasting, radar, and wireless LAN. However, maximum gain and maximum directivity with low losses are the desired characteristics that are sought. In this paper, the novel design of ultra-directive microstrip Yagi design (frequency = 2.4 GHz) is simulated and analyzed. We used the FIT technique to obtain the optimized parameters (geometrical parameters) for the Yagi design. Also, the antenna parameters (gain and directivity), and the matching parameters (VSWR and S11) are simulated using the finite integral technique (FIT). The proposed design showed high directivity and high gain with a narrow beam. Additionally, the investigated design exhibits low loss power due to the low value of the backscattering and also S 11 value. The measured results for the matched parameters of the investigated design are taken from the network analyzer. For our proposed design, the experimental results are very close to the simulated results. The suggested Yagi antenna design may be beneficial for many applications including, Wi-Fi, Bluetooth applications, and wireless applications.

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“…Several theoretical and experimental investigations have assessed the e cacy of various semiconductor materials. Due to silicon-incorporated photonic devices such as sub-wavelength interconnects, modulators, and emission sources, silicon has attracted considerable interest among these semiconductors 19,20 . Silicon also enables chip-scale integration in the mid-infrared (MID-IR) band, which has numerous potential applications, such as chemical and biological sensors, imagers, light sources, and spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

All Silicon MIR super absorber using fractal metasurfaces

Ali

Ghanim

Othman

et al. 2023

Preprint

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The study of blackbody radiation led to the development of quantum mechanics more than a century ago. A blackbody is an ideal absorber, as it absorbs all the electromagnetic radiation that illuminates it. No radiation is transmitted through it, and none is reflected. Now, "bodies" with high absorption qualities are crucial in numerous scientific and technological fields. Perfect absorbers can be used as photodetectors, thermal images, microbolometers, and thermal photovoltaic solar energy conversion. The spectrum of Mid-infrared (MIR) wavelengths offers numerous advantages for a wide range of applications. Among these applications is chemical and biological detection. In this study, we propose a fractal broadband silicon (Si) absorber. The proposed structure is composed of three layers: metal, dielectric, and metal (MDM), with the metal being n-type D-Si and the dielectric being Silicon Carbide (SiC). The structural composition displays a broad absorption profile across a broad spectrum of infrared wavelengths, ranging from 3 to 9 µm. The architectural design was derived from the Sierpinski carpet fractal, and different building locks were simulated to attain optimal absorption. Silicon that has been doped exhibits superior performance compared to metals in energy harvesting applications that utilize plasmonics at the mid-infrared range. Typically, semiconductors exhibit rough surfaces than noble metals, resulting in lower scattering losses. Moreover, silicon presents various advantages, including compatibility with complementary metal-oxide-semiconductor (CMOS) and simple manufacturing through conventional silicon fabrication methods. In addition, the utilization of doped silicon material in the mid-IR region facilitates the creation of microscale integrated plasmonic devices. This combination enables the production of numerous traditional plasmonic devices. The 2D finite element method (FEM) approach via COMSOL software is used to obtain the numerical results. The suggested fractal absorber exhibits high absorption enhancement in the Mid-IR range.

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Design considerations of super-directive nanoantennas for core-shell nanowires

Cited by 29 publications

References 35 publications

Giant localized electromagnetic field of highly doped silicon plasmonic nanoantennas

Giant localized electromagnetic field of highly doped silicon plasmonic nanoantennas

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All Silicon MIR super absorber using fractal metasurfaces

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