A dual band metamaterial absorber using electric field driven LC (ELC) and cave ELC structures

2013 ◽  
Author(s):  
Somak Bhattacharyya ◽  
Saptarshi Ghosh ◽  
Kumar Vaibhav Srivastava
Keyword(s):  
Electric Field ◽  
Metamaterial Absorber ◽  
Dual Band

scholarly journals Tunable and Anisotropic Dual-Band Metamaterial Absorber Using Elliptical Graphene-Black Phosphorus Pairs

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Yijun Cai ◽  
Shuangluan Li ◽  
Yuanguo Zhou ◽  
Xuanyu Wang ◽  
Kai-Da Xu ◽  
...  
Keyword(s):  
Electric Field ◽  
Surface Plasmon ◽  
Infrared Region ◽  
Metamaterial Absorber ◽  
Black Phosphorus ◽  
Dual Band ◽  
Polarization Sensitivity ◽  
Surface Plasmon Resonances ◽  
Field Distributions ◽  
Plasmon Resonances

AbstractWe numerically propose a dual-band absorber in the infrared region based on periodic elliptical graphene-black phosphorus (BP) pairs. The proposed absorber exhibits near-unity anisotropic absorption for both resonances due to the combination of graphene and BP. Each of the resonances is independently tunable via adjusting the geometric parameters. Besides, doping levels of graphene and BP can also tune resonant properties effectively. By analyzing the electric field distributions, surface plasmon resonances are observed in the graphene-BP ellipses, contributing to the strong and anisotropic plasmonic response. Moreover, the robustness for incident angles and polarization sensitivity are also illustrated.

scholarly journals Ultrathin Terahertz Dual-Band Perfect Metamaterial Absorber Using Asymmetric Double-Split Rings Resonator

Symmetry ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 293 ◽  
Author(s):  
Taiguo Lu ◽  
Dawei Zhang ◽  
Peizhen Qiu ◽  
Jiqing Lian ◽  
Ming Jing ◽  
...  
Keyword(s):  
Electric Field ◽  
Metal Layer ◽  
Metamaterial Absorber ◽  
Dual Band ◽  
Asymmetric Distribution ◽  
Absorption Frequency ◽  
Terahertz Band ◽  
Perfect Metamaterial Absorber ◽  
Simulation Results ◽  
Continuous Metal

In this article, an ultrathin terahertz dual band metamaterial absorber made up of patterned asymmetrical double-split rings and a continuous metal layer separated by a thin FR-4 layer is designed. Simulation results show that two almost identical strong absorption peaks appear in the terahertz band. When the incident electric field is perpendicular to the ring gaps located at 11 μm asymmetrically, the absorptivity of 98.6% at 4.48 THz and 98.5% at 4.76 THz can be obtained. The absorption frequency and the absorptivity of the absorber can be modulated by the asymmetric distribution of the gaps. The perfect metamaterial absorber is expected to provide important reference for the design of terahertz modulator, filters, absorbers, and polarizers.

Single-peak-regulation and wide-angle dual-band metamaterial absorber based on hollow-cross and solid-cross resonators

2020 ◽  
Vol 91 (3) ◽  
pp. 30901
Author(s):  
Yibo Tang ◽  
Longhui He ◽  
Jianming Xu ◽  
Hailang He ◽  
Yuhan Li ◽  
...  
Keyword(s):  
Transverse Electric ◽  
Surface Current ◽  
Dielectric Substrate ◽  
Transverse Magnetic ◽  
Metamaterial Absorber ◽  
Absorption Peak ◽  
Dual Band ◽  
Single Peak ◽  
Wide Angle ◽  
Surface Current Density

A dual-band microwave metamaterial absorber with single-peak regulation and wide-angle absorption has been proposed and illustrated. The designed metamaterial absorber is consisted of hollow-cross resonators, solid-cross resonators, dielectric substrate and metallic background plane. Strong absorption peak coefficients of 99.92% and 99.55% are achieved at 8.42 and 11.31 GHz, respectively, which is basically consistent with the experimental results. Surface current density and changing material properties are employed to illustrate the absorptive mechanism. More importantly, the proposed dual-band metamaterial absorber has the adjustable property of single absorption peak and could operate well at wide incidence angles for both transverse electric (TE) and transverse magnetic (TM) waves. Research results could provide and enrich instructive guidances for realizing a single-peak-regulation and wide-angle dual-band metamaterial absorber.

Polarization-insensitive dual-band terahertz metamaterial absorber based on asymmetric arrangement of two rectangular-shaped resonators

Optik ◽  
2021 ◽  
pp. 167669
Author(s):  
Dac Tuyen Le ◽  
Ba Tuan Tong ◽  
Thi Kim Thu Nguyen ◽  
Thanh Nghia Cao ◽  
Hong Quang Nguyen ◽  
...  
Keyword(s):  
Metamaterial Absorber ◽  
Dual Band ◽  
Polarization Insensitive

Design and Investigation of Polarization Independent Dual-Band Metamaterial Absorber

2020 ◽  
Author(s):  
Nur Izzati Zulkefli ◽  
Adel Ashyap ◽  
Ariffuddin Joret ◽  
Siti Hajar Aminah Ali ◽  
Samsul Haimi Dahlan ◽  
...  
Keyword(s):  
Metamaterial Absorber ◽  
Dual Band ◽  
Polarization Independent

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

Absorption enhancement of a dual-band metamaterial absorber

2017 ◽  
Vol 86 ◽  
pp. 158-163 ◽  
Author(s):  
Min Zhong ◽  
Gui Ming Han ◽  
Shui Jie Liu ◽  
Bang Li Xu ◽  
Jie Wang ◽  
...  
Keyword(s):  
Metamaterial Absorber ◽  
Dual Band ◽  
Absorption Enhancement

Dual-band isotropic metamaterial absorber based on near-field interaction in the Ku band

2020 ◽  
Vol 20 (2) ◽  
pp. 331-336 ◽  
Author(s):  
The Linh Pham ◽  
Hong Tiep Dinh ◽  
Dinh Hai Le ◽  
Xuan Khuyen Bui ◽  
Son Tung Bui ◽  
...  
Keyword(s):  
Near Field ◽  
Metamaterial Absorber ◽  
Dual Band ◽  
Field Interaction ◽  
Ku Band

scholarly journals Hybrid Metamaterials Perfect Absorber and Sensitive Sensor in Optical Communication Band

2021 ◽  
Vol 9 ◽  
Author(s):  
Xuehan Liu ◽  
Keyang Li ◽  
Zhao Meng ◽  
Zhun Zhang ◽  
Zhongchao Wei
Keyword(s):  
Optical Communication ◽  
Electromagnetic Waves ◽  
Incident Angle ◽  
Silicon Layer ◽  
Resonance Wavelength ◽  
Metamaterial Absorber ◽  
Absorption Peak ◽  
Dual Band ◽  
Perfect Absorber ◽  
Perfect Absorption

A subwavelength metamaterial perfect absorber (MPA) in optical communication band was proposed and tested using the finite-difference time-domain method. The absorber is periodic and comprises a top layer of diamond silicon surrounded by L-shaped silicon and a gold layer on the substrate. It can achieve dual-band perfect absorption, and one of the peaks is in the optical communication band. By changing the gap (g) between two adjacent pieces of L-shaped silicon, and the thickness (h) of the silicon layer, the resonance wavelength of absorption peak can be tuned. When the incident electromagnetic wave entered the absorber, the metamaterial absorber could almost completely consume the incident electromagnetic waves, thereby achieving more than 99% perfect absorption. The absorption peak reaches 99.986% at 1310 nm and 99.421% at 1550 nm. Moreover, the MPA exposed to different ambient refraction indexes can be applied as plasma sensors, and can achieve multi-channel absorption with high figure of merit (FOM*) value and refractive index (RI) sensitivity. The FOM* values at 1310 nm and 1550 nm are 6615 and 168, respectively, and both resonance peaks have highly RI sensitivity. The results confirm that the MPA is a dual-band, polarization-independent, wide-angle absorber and insensitive to incident angle. Thence it can be applied in the fields of optical communication, used as a light-wave filter and plasma sensor, and so on.

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