Nanoplasmonic Pyramidal Metamaterial Absorber at Optical Frequencies

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.

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Perfect Absorption Conditions and Absorption Characteristics of Terahertz Metamaterial Absorber

Chinese Journal of Lasers ◽

10.3788/cjl201946.0614023 ◽

2019 ◽

Vol 46 (6) ◽

pp. 0614023

Author(s):

崔子健 Zijian Cui ◽

王玥 Yue Wang ◽

朱冬颖 Dongying Zhu ◽

岳莉莎 Lisha Yue ◽

陈素果 Suguo Chen

Keyword(s):

Metamaterial Absorber ◽

Perfect Absorption ◽

Absorption Characteristics

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Design of Dual-Band Terahertz Perfect Metamaterial Absorber Based on Circuit Theory

Molecules ◽

10.3390/molecules25184104 ◽

2020 ◽

Vol 25 (18) ◽

pp. 4104

Author(s):

Zhongmin Liu ◽

Liang Guo ◽

Qingmao Zhang

Keyword(s):

Chemical Potential ◽

Metamaterial Absorber ◽

Circuit Model ◽

Field Analysis ◽

Dual Band ◽

Geometrical Parameters ◽

Absorption Bands ◽

Perfect Absorption ◽

Wide Range ◽

Novel Strategy

We present a novel strategy for designing a dual-band absorber based on graphene metasurface for terahertz frequencies. The absorber consists of a two-dimensional array of patches deposited on a metal-backed dielectric layer. Using an analytical circuit model, we obtain closed-form relatinos for the geometrical parameters of the absorber and the properties of the applied materials to achieve the dual-band absorber. Two absorption bands with perfect absorption at the preset frequencies of 0.5 and 1.5 THz are achieved. The results obtained by the analytical circuit model are compared to the simulations carried out by full-wave electromagnetic field analysis. The agreement between results is very good. We demonstrate that the graphene absorber remains as the dual band for a wide range of the chemical potential. Furthermore, the recommended dual band absorber is insensitive in terms of polarization and remain within various incident angles.

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

Modern Physics Letters B ◽

10.1142/s0217984917502311 ◽

2017 ◽

Vol 31 (25) ◽

pp. 1750231 ◽

Cited By ~ 20

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.

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Independently Tunable Multipurpose Absorber with Single Layer of Metal-Graphene Metamaterials

Materials ◽

10.3390/ma14020284 ◽

2021 ◽

Vol 14 (2) ◽

pp. 284

Author(s):

Chen Han ◽

Renbin Zhong ◽

Zekun Liang ◽

Long Yang ◽

Zheng Fang ◽

...

Keyword(s):

Energy Harvesting ◽

Fermi Level ◽

Potential Application ◽

Single Layer ◽

Wide Band ◽

Metamaterial Absorber ◽

Unit Cell ◽

Perfect Absorption ◽

Solar Energy Harvesting ◽

Band Absorption

This paper reports an independently tunable graphene-based metamaterial absorber (GMA) designed by etching two cascaded resonators with dissimilar sizes in the unit cell. Two perfect absorption peaks were obtained at 6.94 and 10.68 μm with simple single-layer metal-graphene metamaterials; the peaks show absorption values higher than 99%. The mechanism of absorption was analyzed theoretically. The independent tunability of the metamaterial absorber (MA) was realized by varying the Fermi level of graphene under a set of resonators. Furthermore, multi-band and wide-band absorption were observed by the proposed structure upon increasing the number of resonators and resizing them in the unit cell. The obtained results demonstrate the multipurpose performance of this type of absorber and indicate its potential application in diverse applications, such as solar energy harvesting and thermal absorbing.

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Light-absorption characteristics of tumor tissue at ruby and neodymium laser energy wavelengths

Journal of Surgical Research ◽

10.1016/s0022-4804(66)80056-2 ◽

1966 ◽

Vol 6 (12) ◽

pp. 531-535 ◽

Cited By ~ 4

Author(s):

Roxane Hume ◽

Alfred S. Ketcham ◽

John P. Minton

Keyword(s):

Light Absorption ◽

Tumor Tissue ◽

Laser Energy ◽

Neodymium Laser ◽

Absorption Characteristics

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Single particle dual plasmonic effect for efficient organic solar cells

Applied Nanoscience ◽

10.1007/s13204-020-01641-2 ◽

2021 ◽

Author(s):

Adi Prasetio ◽

Soyeon Kim ◽

Muhammad Jahandar ◽

Dong Chan Lim

Keyword(s):

Solar Cells ◽

Organic Solar Cells ◽

Light Absorption ◽

Resonance Effect ◽

Localized Surface Plasmon ◽

Main Role ◽

Charge Generation ◽

One Pot ◽

Wide Range ◽

Light Reflectance

AbstractIncorporating localized surface plasmon resonance (LSPR) into organic solar cells (OSCs) is a popular method for improving the power conversion efficiency (PCE) by introducing better light absorption. In this work, we designed a one-pot synthesis of Ag@SiO2@AuNPs dual plasmons and observed an immense increase in light absorption over a wide range of wavelengths. Ag@SiO2 plays the main role in enhancing light absorption near the ultraviolet band. The silica shell can also further enhance the LSP resonance effect and prevent recombination on the surface of AgNPs. The AuNPs on the Ag@SiO2 shell exhibited strong broad visible-light absorption due to LSP resonance and decreased light reflectance. By utilizing Ag@SiO2@AuNPs, we could enhance the light absorption and photoinduced charge generation, thereby increasing the device PCE to 8.57% and Jsc to 17.67 mA cm−2, which can be attributed to the enhanced optical properties. Meanwhile, devices without LSPR nanoparticles and Ag@SiO2 LSPR only showed PCEs of 7.36% and 8.18%, respectively.

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Effective Application of Magnetic Material Based on Metamaterial Absorber

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.774-776.907 ◽

2013 ◽

Vol 774-776 ◽

pp. 907-912

Author(s):

Hui Bin Zhang ◽

Li Wei Deng ◽

Nan Zhang ◽

Pei Heng Zhou ◽

Jian Liang Xie ◽

...

Keyword(s):

Magnetic Material ◽

Design Method ◽

Copper Wire ◽

Wire Array ◽

Magnetic Loss ◽

Peak Position ◽

Metamaterial Absorber ◽

Absorption Peak ◽

Perfect Absorption ◽

Effective Application

We simulate, fabricate and measure a microwave absorber by introducing metamaterial design method to magnetic material. The proposed absorber is composed of periodic copper wire array, magnetic material coated on copper wires, a foam substrate and a bottom metal plane. The results show a nearly perfect absorption peak around 8.7GHz (simulated) and 7.6GHz (measured). Even though the electric and magnetic field distribution indicate that the absorption is a typical metamaterial absorption, the power loss is neither Ohmic nor dielectric loss but magnetic loss, which is different from typical metamaterial absorber. The skillful introduction of the magnetic loss improves the absorption performance, including the absorption bandwidth and intensity. The designed absorber shows an effective application of the magnetic material, which is only 1/60000 volume proportion of the total absorber. Dependences of the absorption on frequency and the coating volume of the magnetic material manifest that the coated magnetic material can adjust the absorption peak position and intensity. The absorber can be an attractive candidate of electromagnetic wave absorber.

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