Design of an ultrabroadband visible metamaterial absorber based on three-dimensional metallic nanostructures

2017 ◽  
Vol 31 (25) ◽  
pp. 1750231 ◽  
Author(s):  
Hao Luo ◽  
Yong Zhi Cheng
Keyword(s):  
Thermal Imaging ◽  
Three Dimensional ◽  
Metamaterial Absorber ◽  
Optimized Design ◽  
Solar Energy Harvesting ◽  
Relative Bandwidth ◽  
Wide Range ◽  
Polarization Insensitive ◽  
Simulation Results ◽  
Energy Harvesting Devices

We present the design and numerical simulations of an ultrabroadband visible metamaterial absorber (MMA) with polarization-insensitive and wide-angle based on three-dimensional (3D) metallic nanostructure. Distinct from previous designs, the proposed visible MMA only consisted of structured 3D metallic film constructed with an assembly of four vertical split-rings (FVSR) structure. For the optimized design of our MMA, the absorbance of over 90% with a relative bandwidth of 94.8% can be obtained. Further simulation results indicate that our design is polarization-insensitive and also operated well in a wide range of incident angles for both TE and TM modes. In addition, the designed visible MMA design can tolerate some geometric parameters errors in fabrication. Thus, the proposed visible MMA can be potential application in the photodetectors, thermal imaging, photoelectrochemical, and solar energy harvesting devices.

Application of Metamaterial Absorber in Antenna Stealth

2016 ◽  
Vol 707 ◽  
pp. 125-130
Author(s):  
Chun Sheng Tian ◽  
Kai Zhou ◽  
You Lin Guan
Keyword(s):  
Cross Section ◽  
Microstrip Antenna ◽  
Metamaterial Absorber ◽  
Wide Angle ◽  
Maximum Reduction ◽  
Electromagnetic Resonance ◽  
Polarization Insensitive ◽  
Working Frequency ◽  
Simulation Results ◽  
High Absorption

In order to improve the stealth performance of antenna, a metamaterial absorber with high absorption, polarization-insensitive and wide angle based on the electromagnetic resonance is designed. Using of ultra-thin characteristic of absorber, they are attached to the microstrip antenna to reduce its radar cross section. The simulation results show that the new microstrip antenna’s radiation performance remains unchanged compared with conventional microstrip antenna and it has obvious RCS reduction in its working band. While the maximum reduction can reach 28dB at working frequency, and the in-band reduction of antenna is above 3dB. This indicates that the absorber can be used for antennas’ in-band stealth.

Study on Grain Topology with Potts Model Monte Carlo Simulation

2014 ◽  
Vol 926-930 ◽  
pp. 1538-1541
Author(s):  
Hao Wang ◽  
Guo Quan Liu
Keyword(s):  
Experimental Data ◽  
Monte Carlo ◽  
Potts Model ◽  
Three Dimensional ◽  
Wide Range ◽  
The Mean ◽  
Simulation Results ◽  
Number Of Faces ◽  
Grain Topology ◽  
Range Of Values

Three-dimensional normal grain growth has been simulated in scale 300×300×300 using the generally accepted Potts model Monte Carlo method. The studies of the topology of grains indicate that the mean number of faces in the grain network <f>=13.91 is similar to other simulation results, but higher than most of the experimental data which containing a wide range of values, i.e., <f>=11.16~13.93. The three-dimensional AboavWeaire law and Liu-Yu law are observed to hold, but the fit coefficient is different from the theory models.

scholarly journals Three-Dimensional Resistive Metamaterial Absorber Loaded with Metallic Resonators for the Enhancement of Lower-Frequency Absorption

2017 ◽  
Author(s):  
Yang Shen ◽  
Jie Qiu Zhang ◽  
Yong Qiang Pang ◽  
Lin Zheng ◽  
Jia Fu Wang ◽  
...  
Keyword(s):  
Absorption Band ◽  
Three Dimensional ◽  
Areal Density ◽  
Metamaterial Absorber ◽  
Experimental Results ◽  
Broadband Absorption ◽  
Three Samples ◽  
Wide Range ◽  
Metamaterial Absorbers

Resistive patch array incorporating with metallic backplane provided an effective way to the achievement of broadband metamaterial absorbers(MAs). When loading metallic metamaterial to resistive MA, the outstanding construction helps realize more flexible and diversified forms of broadband absorption. In this paper, we attempted to load metallic resonators(MRs) to resistive MA in the three-dimensional construction, which benefits further enhancement of lower-frequency absorption. Simulation showed that the partial absorption band was separated to lower frequency, while the rest of broadband absorption was unaffected. Meanwhile, after combining multi-unit of the proposed MAs, the stair-stepping broadband absorption was also achieved. At last, three samples were fabricated. The agreements between simulations and experimental results demonstrated that resistive MA loaded with MRs provided an effective way for further enhancement of lower-frequency absorption with almost no change of the absorbing structure and areal density. Thus, it is worthy to expect a wide range of applications to emerge inspired from the proposed attempt.

scholarly journals A Designed Broadband Absorber Based on ENZ Mode Incorporating Plasmonic Metasurfaces

Micromachines ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 673 ◽  
Author(s):  
Dang ◽  
Le ◽  
Lee ◽  
Nguyen
Keyword(s):  
Numerical Study ◽  
Metal Structure ◽  
Infrared Region ◽  
Transverse Magnetic ◽  
Metamaterial Absorber ◽  
Light Illumination ◽  
Broadband Absorber ◽  
Practical Applications ◽  
Solar Energy Harvesting ◽  
Wide Range

In this paper, we present a numerical study of a metamaterial absorber that provides polarization-insensitive absorption over a broad bandwidth of operation over the mid-infrared region. The absorber consists of a periodically patterned metal-dielectric-metal structure integrated with an epsilon-near-zero (ENZ) nanolayer into the insulating dielectric gap region. Such an anomalous broadband absorber is achieved thanks to a couple of resonant modes including plasmon and ENZ modes that are excited under mid-IR light illumination. By adding a 0.06-μm-thick ENZ layer between the patterned gold rectangular grating and the SiO2 dielectric layer, the absorber captures >95% light over a 1.5 µm bandwidth centered at a near-8-μm wavelength over a wide range of oblique incidence under transverse-magnetic and -electric polarizations. The designed ENZ-based wideband absorber has potential for many practical applications, including sensing, imaging and solar energy harvesting over a wide frequency regime.

scholarly journals Polarization-Independent Ultra-Wideband Metamaterial Absorber for Solar Harvesting at Infrared Regime

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2560 ◽  
Author(s):  
Asraful Alam ◽  
Sikder Sunbeam Islam ◽  
Md. Hobaibul Islam ◽  
Ali F. Almutairi ◽  
Mohammad Tariqul Islam
Keyword(s):  
Solar Spectrum ◽  
Equivalent Circuit Model ◽  
Metamaterial Absorber ◽  
Simulation Software ◽  
Unit Cell ◽  
Ultra Wideband ◽  
Scattering Parameters ◽  
Frequency Range ◽  
Relative Bandwidth ◽  
Polarization Insensitive

This paper presents an ultra-wideband metamaterial absorber for solar harvesting in the infrared regime (220–360 THz) of the solar spectrum. The proposed absorber consists of square-shaped copper patches of different sizes imposed on a GaAs (Gallium arsenide) substrate. The design and simulation of the unit cell are performed with finite integration technique (FIT)-based simulation software. Scattering parameters are retrieved during the simulation process. The constructed design offers absorbance above 90% within a 37.89% relative bandwidth and 99.99% absorption over a vast portion of the investigated frequency range. An equivalent circuit model is presented to endorse the validity of the proposed structure. The calculated result strongly agrees with the simulated result. Symmetrical construction of the proposed unit cell reports an angular insensitivity up to a 35° oblique incidence. Post-processed simulation data confirm that the design is polarization-insensitive.

scholarly journals Multi-Band Polarization Insensitive Ultra-Thin THz Metamaterial Absorber for Imaging and EMI Shielding Applications

2021 ◽  
Vol 10 (3) ◽  
pp. 43-49
Author(s):  
G. Saxena ◽  
Y. Khanna ◽  
Y. K. Awasthi ◽  
P. Jain
Keyword(s):  
Return Loss ◽  
Metamaterial Absorber ◽  
Circular Ring ◽  
Unit Cell Dimension ◽  
Polarization Angle ◽  
Emi Shielding ◽  
Thz Imaging ◽  
Wide Range ◽  
Polarization Insensitive ◽  
Multi Band

this article, a multi-band polarization-insensitive metamaterial absorber is designed for THz imaging and EMI shielding. A unique oval-shaped structure with three circular ring-shaped resonators is proposed with a unit cell dimension of36×36×19.6μm3. The absorbance of the proposed multiband MMA is 98.57%, 90%and 99.85% at 5.58, 7.98-8.84, 11.45THz frequency respectively. Return loss is nearly the same for the changing incident and polarization angle. Therefore, this metamaterial absorber with a wide range of polarization insensitivity is found and it is also suitable for quantum RADAR Imaging, energy harvesting, and optoelectronic devices.

scholarly journals Nanoplasmonic Pyramidal Metamaterial Absorber at Optical Frequencies

2022 ◽  
Author(s):  
Muhammad Amin ◽  
Saleh Abdullah Basamed ◽  
Ahmed Salem Qniqoon ◽  
Faisal Aied Alshabibi ◽  
Saleh Mohammed Ba Raean ◽  
...  
Keyword(s):  
Light Absorption ◽  
Thermal Imaging ◽  
Resonant Absorption ◽  
Metamaterial Absorber ◽  
Spectral Absorption ◽  
Perfect Absorption ◽  
Wide Range ◽  
Thermal Emitters ◽  
Polarization Independent ◽  
Absorption Characteristics

Abstract A pyramidal shaped metamaterial absorber (PMA) supports broadband and polarization independent resonant absorption at optical frequencies. The PMA is designed by stack of alternative plasmonic/dielectric multilayers. These nanoplasmonic pyramids offers resonant absorption characteristics at wide range of optical frequencies. The optimized PMA structure allows 76% spectral absorption and nearly perfect absorption (over 90%) at several bands between range of 400 nm – 1500 nm wavelength. These light absorption characteristics of PMA are useful for photodetection, thermal imaging, thermal emitters, and solar cells etc.

Investigation of a broadband and polarization-insensitive optical absorber based on closed-ring resonator

2016 ◽  
Vol 25 (03) ◽  
pp. 1650032 ◽  
Author(s):  
Dan Hu ◽  
Hong-Yan Wang ◽  
Qiao-Fen Zhu ◽  
Xi-Wei Zhang ◽  
Zhen-Jie Tang
Keyword(s):  
Ring Resonator ◽  
Metamaterial Absorber ◽  
Broadband Absorption ◽  
Solar Energy Harvesting ◽  
Closed Ring ◽  
Visible Wavelength Range ◽  
Potential Applications ◽  
Polarization Insensitive ◽  
Sandwiched Structure ◽  
Compact Design

A broadband and polarization-insensitive optical metamaterial absorber (MA) based on the refractory metal chromium (Cr) closed-ring resonator is theoretically investigated. The semiconducting silicon dioxide (SiO[Formula: see text] thin film is introduced as the space layer in this sandwiched structure. Utilizing the symmetrical geometry of the proposed MA structure, polarization insensitivity of the broadband absorption is gained. The simulation results show that the absorber with Cr closed-ring array obtains an average absorption of 99.25% from 400[Formula: see text]nm to 900[Formula: see text]nm, covering the total visible wavelength range. This compact design may have potential applications in solar energy harvesting, thermal imaging, and emissivity control.

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