The radiative properties of metamaterial nanostructures made of two-dimensional tungsten gratings on a thin dielectric spacer and an opaque tungsen film from UV to mid-infrared region as potential selective solar absorbers will facilitate the design of novel highly efficient solar absorber to enhance the performance of various solar energy …
WhatsAppWe have designed and fabricated TiN/SiO2/TiN–HfO2-based new metamaterial microstructures as an absorber of the visible wavelength, in the range of 400–700 nm, with exceptionally high absorption efficiency (>96%) for solar energy harvesting purposes and generation of heat upon absorption of electromagnetic energy. The finite element …
WhatsAppBroadband metamaterial perfect absorbers are reviewed, including design methods and applications. ... Following this, applications of BMMPA in solar photovoltaics, photodetection, bolometry, and manipulation of mechanical resonances are reviewed. Finally, ...
WhatsAppMetamaterial absorbers have attracted great attention over the past few years and exhibited a promising prospect in solar energy harvesting and solar thermophotovoltaics (STPVs). In this work, we introduce a solar absorber scheme, which enables efficient solar irradiance harvesting, superb thermal robustness and high solar thermal energy …
WhatsAppSince the first demonstration, remarkable progress has been made in the theoretical analysis, structural design, numerical simulation, and potential applications of metamaterial absorbers (MAs). With the continuous advancement of novel materials and creative designs, the absorption of MAs is significantly improved over a wide frequency …
WhatsAppWe proposed cross-shaped gold metasurface-based ultrawideband solar absorber. The wideband absorber is formed by the three-layer structure of Tungston, MgF2, and gold material. The behaviour of the absorber is investigated numerically for the solar wavelength range of 0.25–3 µm wavelength range. The absorption values of the …
WhatsAppA MXene-based metamaterial absorber is proposed with an operational frequency range of 300–714 THz for improving absorbance capability of solar cells. It has …
WhatsAppThe absorber is analyzed according to the equivalent medium theory, and since the structural parameters of the MXene grating are smaller than the wavelength, we consider the metamaterial absorber as a homogeneous material, and explode it using the S-parameter inversion method [43, 44].].
WhatsAppSolar absorber is a key device that converts solar irradiation into heat via photothermal conversion, which has potential applications in solar thermal power systems, and seawater desalination. In this paper, we propose a wide-angle, broadband and polarization insensitivity metamaterial solar absorber based on titanium nitride (TiN). …
WhatsAppPDF | We present the design for an absorbing metamaterial (MM) with near unity absorbance A(omega). ... In this paper, a stacked cylinder solar absorber with a bimetallic dielectric layer (Fe ...
WhatsAppMetamaterial perfect absorbers have been widely studied due to their potential applications in fields such as sensors, saltwater purification, switching devices, …
WhatsAppThe metamaterial absorber with single-sized tungsten patches exhibits high absorptance in the visible and near-infrared region due to several mechanisms such as surface plasmon polaritons, magnetic polaritons, …
WhatsAppHere, we present a solar metamaterial absorber, consisting of a Ti substrate, a Si 3 N 4 dielectric spacer layer, and a Ti–SiO 2 patterned layer. The results of the simulation show that the average absorption of the absorber is 98.16% in the range of 200–4200 nm ...
WhatsAppThe previous research focused on developing narrow band solar absorbers which have specific applications. But for applications like photovoltaics, solar energy harvesting a broadband absorption response is a prerequisite and a necessity. To achieve this, we have explored a solar absorber based on a Zirconium resonator and Germanium substrate. …
WhatsAppA polarization insensitive, broadband and wide-angle perfect metamaterial absorber for nearly full solar spectrum harvesting is designed and studied. The structure is a periodic dielectric square array coated with an iron film separated from a bottom iron film by a silica planar and a phase change material cavity.
WhatsAppSchematics of 1-D and 2-D grating-Mie-metamaterial based solar absorbers. (A) 1-D triangular Al 2 O 3 surface gratings of height, h = 150 nm, period, Λ = 100 nm, on top of W-Si 3 N 4 -W stacks ...
WhatsAppSpectrally selective solar absorbers are widely employed in solar thermal energy systems. This work theoretically investigates thermal radiative properties of metamaterials consisting of 1-D and 2-D grating-Mie-metamaterials (tungsten nanoparticles embedded in alumina) on top of multilayered refractory materials (tungsten …
WhatsAppIn this paper, we propose a design method that combines impedance matching and circuit modelling, and design a metamaterial solar absorber. The …
WhatsAppThe proposed solar absorber has an efficiency of 88% (i.e. captures 88% of total energy emitted from a blackbody) for broadband solar spectrum from 400nm to …
WhatsAppIn this article, an ultra-broadband, mechanically stress able, UV to NIR radiation-detaining metamaterial-inspired solar absorber is reported with improved …
WhatsAppThis work develops the deep learning model based on metamaterial spectrum transformer (MST) for the powerful design of high-performance solar metamaterial absorbers. The MST divides the …
WhatsAppMetamaterial absorbers have garnered significant interest due to their unique electromagnetic properties, which facilitate the efficient absorption of electromagnetic radiation in a specific frequency range or multiple frequency ranges. The metamaterial absorbers are designed based on artificially engineered structures that …
WhatsAppWavelength-selective metamaterial absorbers in the mid-infrared range are demonstrated by using multiple tungsten cross resonators. By adjusting the geometrical parameters of cross resonators in single-sized unit cells, near-perfect absorption with single absorption peak tunable from 3.5 µm to 5.5 µm is realized. The combination of two, three, or four …
WhatsAppPolarization and angular insensitive bendable ...
WhatsAppA MXene-based metamaterial absorber is proposed with an operational frequency range of 300–714 THz for improving absorbance capability of solar cells. It has four metallic strips together with a central patch symmetrically positioned on top of the $$text {Ti}_3text {C}_2text {T}_x$$ Ti 3 C 2 T x MXene material, which is a new …
WhatsAppWe propose a broadband solar metamaterial absorber based on a Ti-SiO2-Ti-SiO2-Fe2O3 five-layer configuration. The optimized parameters of the configuration are obtained from the deep neural network with Keras in Python. The average absorptance of the absorber can achieve 98.70% in the wavelength range from 170 nm to 900 nm …
WhatsAppIn recent years, significant strides have been made in the inverse design of metamaterial perfect absorbers (MPAs) using deep learning techniques. However, this progress has been hindered by the functional homogeneity arising from the structural uniformity of the inverse-designed MPAs. In this paper, we address this limitation by …
WhatsAppPerfect solar energy absorption is becoming more and more significant in the fields of carbon neutrality, the numerical study of various metamaterial solar absorbers is boosting but their fabrication is still challenging us a lot. In this study, we propose a unique type of metamaterial absorbers with cross shaped nanostructures achieving efficient absorptance …
WhatsAppA broad-band polarization-insensitive metamaterial absorber has been introduced to absorb solar radiation in the range of 400 nm–1000 nm. • Our engineered platform is broad-band and capable of absorbing around 80% of …
WhatsAppA perfect selective metamaterial absorber with four-pointed star prisms is proposed. • Mechanisms for the perfect spectral selectivity of the absorber are revealed. • High efficiencies of 92.31–77.78% are achieved at …
WhatsAppTo reduce the thermal loss and improve the efficiency, solar selective metamaterial absorbers, which possess high total solar absorptance in visible to near …
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