Multipole Resonance in Arrays of Diamond Dielectric: A Metamaterial Perfect Absorber in the Visible Regime

Excellent characteristics and promising application prospects promote the rapid development of metamaterials. We have numerically proposed and demonstrated a novel subwavelength broadband metamaterial perfect absorber (BMPA) based on diamond dielectric arrays. The proposed absorber is composed of an ultra-thin two-layer structure covering the dielectric periodic array on a metal substrate. The materials of dielectric silicon (Si) and gold (Au) substrate are discussed in detail. In addition, different dielectric and refractory materials are also applied to achieve broadband absorption, which will make the proposed absorber greatly broaden the application field. A perfect absorption window (i.e., absorption rate exceeding 90%) can be obtained from near-ultraviolet to the visible range. The average absorption rate of 93.3% is achieved in the visible range. The results of multipole decomposition show that broadband absorption is mainly caused by electromagnetic dipole resonance and lattice resonance in a periodic array of Si. The proposed absorber can be extended freely by adjusting the structural parameters. The polarization-independent and incident angle insensitivity are proved. The proposed absorber may well be used in light energy acquisition, as well as for the scalability of optoelectronic and sensing devices.

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Perfect Selective Metamaterial Absorber With Thin-Film of GaAs Layer In The Visible Region For Solar Cell Applications

10.21203/rs.3.rs-557651/v1 ◽

2021 ◽

Author(s):

Raj Kumar ◽

Bipin K Singh ◽

Rajesh K Tiwari ◽

Praveen C Pandey

Keyword(s):

Structural Parameters ◽

Short Circuit ◽

Effective Permittivity ◽

Visible Region ◽

Special Kind ◽

Short Circuit Current ◽

Gaas Layer ◽

Visible Range ◽

Perfect Absorber ◽

Perfect Absorption

Abstract In this paper, we have presented a new design of a metamaterial perfect absorber (MPA) consisting of three layers of metal-dielectric-metal in which the top layer is considered of special kind square patches at different places in a unit cell. This MPA exhibits wideband, wide-angle, and polarization-independent absorption performance in the visible region. This structure originates the plasmonic resonance which is responsible for the perfect absorption in the optical region. Under a specific condition, this simulated absorber structure exhibits an extremely high broadband absorption between 591.54 nm to 704.40 nm wavelength range with near-unity absorption, and a single peak observed at 385.33 nm with absorption 94.16%. We extracted the impedance of the absorber and matched it with free space, and also demonstrated the effective permittivity and permeability. Moreover, the parametric study of the resonators, dielectric layer, and multi-band topology has also been investigated. The polarization-insensitive-based metamaterial may be utilized to improve the efficiency of different devices in the visible range. Furthermore, we have calculated the absorption of the proposed MPA under the solar radiation (AM1.5) for different structural parameters. The proposed absorber greatly enhances the conversion efficiency which is highly useful for solar cells. We also determined the short circuit current density of this absorber for different thicknesses of the GaAs layer. Al metal patches at meta-surface provide nearly similar performance in comparison with other costly metals. Therefore, the proposed structure with cheaper Al metal may be used for different devices as the perfect absorber.

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A Perfect Absorber Based on Similar Fabry-Perot Four-Band in the Visible Range

Nanomaterials ◽

10.3390/nano10030488 ◽

2020 ◽

Vol 10 (3) ◽

pp. 488 ◽

Cited By ~ 11

Author(s):

Pinghui Wu ◽

Congfen Zhang ◽

Yijun Tang ◽

Bin Liu ◽

Li Lv

Keyword(s):

Near Infrared ◽

Layer Structure ◽

Incident Angle ◽

Middle Layer ◽

Absorption Efficiency ◽

Visible Range ◽

Polarization Angle ◽

Perfect Absorber ◽

Perfect Absorption ◽

Fabry Perot

A simple metamaterial absorber is proposed to achieve near-perfect absorption in visible and near-infrared wavelengths. The absorber is composed of metal-dielectric-metal (MIM) three-layer structure. The materials of these three-layer structures are Au, SiO2, and Au. The top metal structure of the absorber is composed of hollow three-dimensional metal rings regularly arranged periodically. The results show that the high absorption efficiency at a specific wavelength is mainly due to the resonance of the Fabry–Perot effect (FP) in the intermediate layer of the dielectric medium, resulting in the resonance light being trapped in the middle layer, thus improving the absorption efficiency. The almost perfect multiband absorption, which is independent of polarization angle and insensitivity of incident angle, lends the absorber great application prospects for filtering and optoelectronics.

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Refractory Ultra-Broadband Perfect Absorber from Visible to Near-Infrared

Nanomaterials ◽

10.3390/nano8121038 ◽

2018 ◽

Vol 8 (12) ◽

pp. 1038 ◽

Cited By ~ 19

Author(s):

Huixuan Gao ◽

Wei Peng ◽

Shuwen Chu ◽

Wenli Cui ◽

Zhi Liu ◽

...

Keyword(s):

Solar Radiation ◽

Near Infrared ◽

Layer Structure ◽

Incident Angle ◽

Cavity Resonance ◽

Perfect Absorber ◽

Perfect Absorption ◽

Excellent Thermal Stability ◽

Broadband Absorption ◽

The Earth

The spectral range of solar radiation observed on the earth is approximately 295 to 2500 nm. How to widen the absorption band of the plasmonic absorber in this range has become a hot issue in recent years. In this paper, we propose a highly applicable refractory perfect absorber with an elliptical titanium nanodisk array based on a silica–titanium–silica–titanium four-layer structure. Through theoretical design and numerical demonstration, the interaction of surface plasmon resonance with the Fabry–Perot cavity resonance results in high absorption characteristics. Our investigations illustrate that it can achieve ultra-broadband absorption above 90% from a visible 550-nm wavelength to a near-infrared 2200-nm wavelength continuously. In particular, a continuous 712-nm broadband perfect absorption of up to 99% is achieved from wavelengths from 1013 to 1725 nm. The air mass 1.5 solar simulation from a finite-difference time domain demonstrates that this absorber can provide an average absorption rate of 93.26% from wavelengths of 295 to 2500 nm, which can absorb solar radiation efficiently on the earth. Because of the high melting point of Ti material and the symmetrical structure of this device, this perfect absorber has excellent thermal stability, polarization independence, and large incident-angle insensitivity. Hence, it can be used for solar cells, thermal emitters, and infrared detection with further investigation.

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Broadband absorption of monolayer MoS2 in visible region using a tetramerized nanorod metasurface

Journal of Optics ◽

10.1088/2040-8986/ac41b9 ◽

2021 ◽

Author(s):

Yao Pei ◽

Tian Sang ◽

Qing Mi ◽

Jicheng Wang ◽

Yueke Wang

Keyword(s):

Structural Parameters ◽

Incident Light ◽

Visible Region ◽

Visible Range ◽

Monolayer Mos2 ◽

Broadband Absorption ◽

High Efficient ◽

Independent Features ◽

The Individual ◽

Different Diameters

Abstract High-efficient broadband absorption of the monolayer MoS2 is achieved by using a tetramerized nanorod metasurface (TNM), and the average absorption of 64.5% for the monolayer MoS2 can be obtained in the visible range of 400-750 nm. The unit cell of the TNM consists four Ag nanorods with different diameters, the incident light can be selectively absorbed by the monolayer MoS2 due to the magnetic resonance associated with the individual Ag nanorod, and broadband absorption of the monolayer MoS2 is realizable due to the cooperative magnetic resonances related to the tetramerized Ag nanorods. In addition, the absorption of the monolayer MoS2 is robust to the variation of the structural parameters, and it exhibits wide-angle and polarization-independent features.

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A refractory metamaterial absorber for ultra-broadband, omnidirectional and polarization-independent absorption in the UV-NIR spectrum

Nanoscale ◽

10.1039/c8nr01728j ◽

2018 ◽

Vol 10 (17) ◽

pp. 8298-8303 ◽

Cited By ~ 63

Author(s):

Yijia Huang ◽

Ling Liu ◽

Mingbo Pu ◽

Xiong Li ◽

Xiaoliang Ma ◽

...

Keyword(s):

Near Infrared ◽

Metamaterial Absorber ◽

Perfect Absorber ◽

Broadband Absorption ◽

Polarization Independent ◽

Metamaterial Perfect Absorber

In this paper, efficient ultra-broadband absorption from ultraviolet (UV) to near infrared (NIR) is achieved using a metamaterial perfect absorber (MPA) with refractory constituents.

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Colon Cancer Detection by Designing and Analytical Evaluation of a Water-based THz Metamaterial Perfect Absorber

IEEE Sensors Journal ◽

10.1109/jsen.2021.3087953 ◽

2021 ◽

pp. 1-1

Author(s):

Zohreh Vafapour ◽

William Troy ◽

Ali Rashidi

Keyword(s):

Colon Cancer ◽

Cancer Detection ◽

Perfect Absorber ◽

Analytical Evaluation ◽

Water Based ◽

Metamaterial Perfect Absorber

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Dual Band thin Metamaterial Perfect Absorber Based on Triangle Shape

Journal of Physics Conference Series ◽

10.1088/1742-6596/1818/1/012056 ◽

2021 ◽

Vol 1818 (1) ◽

pp. 012056

Author(s):

Khalid Saeed Lateef Al-Badri

Keyword(s):

Dual Band ◽

Perfect Absorber ◽

Metamaterial Perfect Absorber

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A terahertz dual-band metamaterial perfect absorber based on metal-dielectric-metal multi-layer columns

Optical and Quantum Electronics ◽

10.1007/s11082-021-02766-6 ◽

2021 ◽

Vol 53 (2) ◽

Author(s):

Pouria Zamzam ◽

Pejman Rezaei

Keyword(s):

Dual Band ◽

Perfect Absorber ◽

Metamaterial Perfect Absorber

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Artificial synapses with a sponge-like double-layer porous oxide memristor

NPG Asia Materials ◽

10.1038/s41427-020-00274-9 ◽

2021 ◽

Vol 13 (1) ◽

Author(s):

Qin Gao ◽

Anping Huang ◽

Jing Zhang ◽

Yuhang Ji ◽

Jingjing Zhang ◽

...

Keyword(s):

Double Layer ◽

Layer Structure ◽

Learning Experience ◽

Rapid Development ◽

Spike Timing ◽

Synaptic Functions ◽

Intelligence Studies ◽

Bionic Structure ◽

Porous Oxide ◽

The Stability

AbstractClosely following the rapid development of artificial intelligence, studies of the human brain and neurobiology are focusing on the biological mechanisms of neurons and synapses. Herein, a memory system employing a nanoporous double-layer structure for simulation of synaptic functions is described. The sponge-like double-layer porous (SLDLP) oxide stack of Pt/porous LiCoO2/porous SiO2/Si is designed as presynaptic and postsynaptic membranes. This bionic structure exhibits high ON–OFF ratios up to 108 during the stability test, and data can be maintained for 105 s despite a small read voltage of 0.5 V. Typical synaptic functions, such as nonlinear transmission characteristics, spike-timing-dependent plasticity, and learning-experience behaviors, are achieved simultaneously with this device. Based on the hydrodynamic transport mechanism of water molecules in porous sponges and the principle of water storage, the synaptic behavior of the device is discussed. The SLDLP oxide memristor is very promising due to its excellent synaptic performance and potential in neuromorphic computing.

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