Tunable multi-band absorption in metasurface of graphene ribbons based on composite structure

2017 ◽  
Vol 79 (1) ◽  
pp. 10201
Author(s):  
Renxia Ning ◽  
Zheng Jiao ◽  
Jie Bao
Keyword(s):  
Composite Structure ◽  
Band Absorption ◽  
Multi Band

Magnetically Tunable Multi-band Absorption of Graphene Based on Photonic Crystal Heterostructure

2020 ◽  
Vol 41 (5) ◽  
pp. 624-630
Author(s):  
高金霞 GAO Jin-xia ◽  
兰云蕾 LAN Yun-lei ◽  
武继江 WU Ji-jiang
Keyword(s):  
Photonic Crystal ◽  
Band Absorption ◽  
Photonic Crystal Heterostructure ◽  
Multi Band

Numerical Study on Controllable Multi-Band Microwave Metamaterial Absorbers

2011 ◽  
Vol 239-242 ◽  
pp. 1260-1264
Author(s):  
Wei Wei Ji ◽  
Tao Wang ◽  
Yan Nie ◽  
Rong Zhou Gong
Keyword(s):  
Numerical Study ◽  
Impedance Matching ◽  
Single Layer ◽  
Surface Current ◽  
Metamaterial Absorber ◽  
Band Absorption ◽  
Different Dimensions ◽  
Resonant Feature ◽  
Difference Time ◽  
Multi Band

Based on the impedance matching and electromagnetic resonant characteristic of composite materials, we present a single-layer metamaterial absorber consisting of arch copper loop and substrate FR-4, of which the resonant frequency depended on the loop’s geometry perimeter. By combining resonant loops with different dimensions together, we can achieve multi-band absorption. The standard finite difference time domain method was used to calculate the magnitudes of reflectance, and then the induced surface current and power loss distributions were demonstrated to analyze the insight physical picture of the multi-band resonant feature. By optimizing the simulation results, the absorptivities of two absorption peaks are all above 98% when the number of copper loops is two, 95% for three absorption peaks of three loops, and 87% for four absorption peaks of four loops.

Phase Resonance Tuning and Multi-Band Absorption Via Graphene-Covered Compound Metallic Gratings

2017 ◽  
Vol 53 (5) ◽  
pp. 1-10 ◽  
Author(s):  
Omid Hemmatyar ◽  
Babak Rahmani ◽  
Amirmasood Bagheri ◽  
Amin Khavasi
Keyword(s):  
Resonance Tuning ◽  
Metallic Gratings ◽  
Band Absorption ◽  
Phase Resonance ◽  
Multi Band

Multi-band absorption induced by near-field coupling and defects in metamaterial

Optik ◽  
2018 ◽  
Vol 156 ◽  
pp. 811-816 ◽  
Author(s):  
Dang Hong Luu ◽  
Bui Son Tung ◽  
Bui Xuan Khuyen ◽  
Le Dac Tuyen ◽  
Vu Dinh Lam
Keyword(s):  
Near Field ◽  
Field Coupling ◽  
Band Absorption ◽  
Multi Band

scholarly journals Experimental Verification of a TH\(\text{z}\) Multi-band Metamaterial Absorber

2020 ◽  
Vol 30 (4) ◽  
pp. 311
Author(s):  
Van Huynh Tran ◽  
Thanh Tung Nguyen ◽  
Xuan Khuyen Bui ◽  
Dinh Lam Vu ◽  
Son Tung Bui ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Experimental Verification ◽  
Metamaterial Absorber ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Dielectric Spacer ◽  
Wide Range ◽  
Band Absorption ◽  
Absorption Performance ◽  
Metamaterial Absorbers ◽  
Multi Band

Multi-band metamaterial absorbers have been of great interest owing to their potentials for a wide range of communicating, sensing, imaging, and energy harvesting applications. In this work, we experimentally investigate a four-band metamaterial absorber operating at THz frequencies. The metamaterials are fabricated using the maskless UV photolithography and e-beam evaporation techniques. The absorption spectra of the proposed absorber are measured using the micro-Fourier transformed infrared spectroscopy. It was demonstrated that multi-band absorption behavior originates from different individual metamaterial resonators. The thickness of the dielectric spacer plays a key role in optimizing the absorption performance, in line with the predicted results on single-band THz absorbers.

Enhancement of multi-band absorption based on compound structure metamaterials

2019 ◽  
Vol 115 ◽  
pp. 239-245 ◽  
Author(s):  
Shengyong Li ◽  
Xiaochuan Ai ◽  
Ronghua Wu ◽  
Jiajun Chen ◽  
Tao Jiang
Keyword(s):  
Compound Structure ◽  
Band Absorption ◽  
Multi Band

scholarly journals Numerical Study on the Absorption Characteristics of Subwavelength Metallic Gratings Covered with a Lossy Dielectric Layer

2018 ◽  
Vol 8 (9) ◽  
pp. 1445
Author(s):  
Chi-Young Hwang ◽  
Yong-Hae Kim ◽  
Ji Choi ◽  
Gi Kim ◽  
Jong-Heon Yang ◽  
...  
Keyword(s):  
Dielectric Layer ◽  
Numerical Study ◽  
Structural Parameters ◽  
Resonant Cavity ◽  
Visible Range ◽  
Absorption Properties ◽  
Perfect Absorption ◽  
Metallic Gratings ◽  
Band Absorption ◽  
Multi Band

Optical absorbers have been a topic of intense research due to their importance in many applications. In particular, multi-band and perfect absorption features in a desired frequency range are essential in broadband applications. In this work, we numerically studied the absorption properties of subwavelength metallic gratings coated with a dielectric layer. Here, the structure is considered to be an integration between a resonant cavity and a subwavelength metallic grating. Two appropriately designed structures can exhibit multi-band absorption properties. In addition to the numerical simulation results, we elaborate on determining the appropriate structural parameters that yield the desired spectral absorption profile in the visible range. We also numerically identify critical coupling conditions for perfect absorption.

Sign in / Sign up

Export Citation Format

Share Document