Tunable dual-band perfect metamaterial absorber based on monolayer graphene arrays as refractive index sensor

2020 ◽  
Vol 59 (9) ◽  
pp. 095002 ◽  
Author(s):  
Jian Li ◽  
Qinghua Liao ◽  
Haoming Li ◽  
Wenxing Liu ◽  
Tianbao Yu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Metamaterial Absorber ◽  
Dual Band ◽  
Monolayer Graphene ◽  
Refractive Index Sensor ◽  
Perfect Metamaterial Absorber

scholarly journals Dual-band tunable perfect metamaterial absorber in the THz range

2016 ◽  
Vol 24 (2) ◽  
pp. 1518 ◽  
Author(s):  
Gang Yao ◽  
Furi Ling ◽  
Jin Yue ◽  
Chunya Luo ◽  
Jie Ji ◽  
...  
Keyword(s):  
Metamaterial Absorber ◽  
Dual Band ◽  
Perfect Metamaterial Absorber ◽  
Thz Range

scholarly journals A Naked Eye Refractive Index Sensor with a Visible Multiple Peak Metamaterial Absorber

Sensors ◽  
2015 ◽  
Vol 15 (4) ◽  
pp. 7454-7461 ◽  
Author(s):  
Heli Ma ◽  
Kun Song ◽  
Liang Zhou ◽  
Xiaopeng Zhao
Keyword(s):  
Refractive Index ◽  
Metamaterial Absorber ◽  
Refractive Index Sensor ◽  
Multiple Peak ◽  
Naked Eye

scholarly journals A Tunable Terahertz Metamaterial Absorber Composed of Hourglass-Shaped Graphene Arrays

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 533 ◽  
Author(s):  
Yunping Qi ◽  
Yu Zhang ◽  
Chuqin Liu ◽  
Ting Zhang ◽  
Baohe Zhang ◽  
...  
Keyword(s):  
Fdtd Method ◽  
Bilayer Graphene ◽  
Metamaterial Absorber ◽  
Dual Band ◽  
Maximum Absorption ◽  
Monolayer Graphene ◽  
Selective Absorption ◽  
Chemical Potentials ◽  
Difference Time ◽  
Absorption Characteristics

In this paper, we demonstrate a tunable periodic hourglass-shaped graphene arrays absorber in the infrared (IR) and terahertz (THz) frequency bands. The effects of graphene geometric parameters, chemical potentials, periods, and incident angles on the pure absorption characteristics are studied by using the Finite Difference Time Domain (FDTD) method. In addition, this paper also analyzes the pure absorption characteristics of bilayer graphene arrays. The simulation results show that the maximum absorption reaches 38.2% for the monolayer graphene structure. Furthermore, comparing the bilayer graphene structure with the monolayer structure under the same conditions shows that the bilayer structure has a tunable dual-band selective absorption effect and has a higher maximum absorption of 41.7%. Moreover, it was found that there are dual-band tunable absorption peaks at 21.6   μ m and 36.3   μ m with the maximum absorption of 41.7% and 11%. The proposed structure is a convenient method which could be used in the design of graphene-based optoelectronic devices, biosensors, and environmental monitors.

scholarly journals Two-layered Dual-band Perfect Metamaterial Absorber at K band Frequency

2018 ◽  
Vol 7 (2) ◽  
pp. 25-27
Author(s):  
M. C. Tran ◽  
T. T. H. Phuong
Keyword(s):  
Metamaterial Absorber ◽  
Dual Band ◽  
Material Structure ◽  
Perfect Absorption ◽  
Band Frequency ◽  
Absorption Frequency ◽  
Dielectric Layers ◽  
Absorber Structure ◽  
Perfect Metamaterial Absorber ◽  
K Band

This paper presents a study of a novel absorber structure based on two-dielectric-layers, two perfect absorption frequency bands at K band (f1 = 26.5 GHz and f2 = 28.6 GHz) go under observance. The study of the dependence of absorption and frequency on relative distance between the layers of material and the material structure parameters are discussed. 

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