Design of a Broadband Tunable Terahertz Metamaterial Absorber Based on Complementary Structural Graphene
We present a simple design for a broadband tunable terahertz (THz) metamaterial absorber (MMA) consisting of a complementary cross-oval-shaped graphene (CCOSG) structure and dielectric substrate placed on a continuous metal film. Both numerical simulation and theoretical calculation results indicate...
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doaj-efb8d42c992349808d288adf0b55aa012020-11-24T22:57:00ZengMDPI AGMaterials1996-19442018-03-0111454010.3390/ma11040540ma11040540Design of a Broadband Tunable Terahertz Metamaterial Absorber Based on Complementary Structural GrapheneMu Lin Huang0Yong Zhi Cheng1Zheng Ze Cheng2Hao Ran Chen3Xue Song Mao4Rong Zhou Gong5Engineering Research Center for Metallurgical Automation and Detecting Technology Ministry of Education, Wuhan University of Science and Technology, Wuhan 430083, ChinaEngineering Research Center for Metallurgical Automation and Detecting Technology Ministry of Education, Wuhan University of Science and Technology, Wuhan 430083, ChinaSchool of Electronic and Information Engineering, Hubei University of Science and Technology, Xianning 437100, ChinaEngineering Research Center for Metallurgical Automation and Detecting Technology Ministry of Education, Wuhan University of Science and Technology, Wuhan 430083, ChinaEngineering Research Center for Metallurgical Automation and Detecting Technology Ministry of Education, Wuhan University of Science and Technology, Wuhan 430083, ChinaSchool of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, ChinaWe present a simple design for a broadband tunable terahertz (THz) metamaterial absorber (MMA) consisting of a complementary cross-oval-shaped graphene (CCOSG) structure and dielectric substrate placed on a continuous metal film. Both numerical simulation and theoretical calculation results indicate that the absorbance is greater than 80% from 1.2 to 1.8 THz, and the corresponding relative bandwidth is up to 40%. Simulated electric field and power loss density distributions reveal that the broadband absorption mainly originates from the excitation of continuous surface plasmon resonance (SPR) on the CCOSG. In addition, the MMA is polarization-insensitive for both transverse-electric (TE) and transverse-magnetic (TM) modes due to the geometry rotational symmetry of the unit-cell structure. Furthermore, the broadband absorption properties of the designed MMA can be effectively tunable by varying the geometric parameters of the unit-cell and chemical potential of graphene. Our results may find promising applications in sensing, detecting, and optoelectronic-related devices.http://www.mdpi.com/1996-1944/11/4/540terahertz metamaterial absorbergraphenebroadband tunable absorptionsurface plasmon resonances |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mu Lin Huang Yong Zhi Cheng Zheng Ze Cheng Hao Ran Chen Xue Song Mao Rong Zhou Gong |
spellingShingle |
Mu Lin Huang Yong Zhi Cheng Zheng Ze Cheng Hao Ran Chen Xue Song Mao Rong Zhou Gong Design of a Broadband Tunable Terahertz Metamaterial Absorber Based on Complementary Structural Graphene Materials terahertz metamaterial absorber graphene broadband tunable absorption surface plasmon resonances |
author_facet |
Mu Lin Huang Yong Zhi Cheng Zheng Ze Cheng Hao Ran Chen Xue Song Mao Rong Zhou Gong |
author_sort |
Mu Lin Huang |
title |
Design of a Broadband Tunable Terahertz Metamaterial Absorber Based on Complementary Structural Graphene |
title_short |
Design of a Broadband Tunable Terahertz Metamaterial Absorber Based on Complementary Structural Graphene |
title_full |
Design of a Broadband Tunable Terahertz Metamaterial Absorber Based on Complementary Structural Graphene |
title_fullStr |
Design of a Broadband Tunable Terahertz Metamaterial Absorber Based on Complementary Structural Graphene |
title_full_unstemmed |
Design of a Broadband Tunable Terahertz Metamaterial Absorber Based on Complementary Structural Graphene |
title_sort |
design of a broadband tunable terahertz metamaterial absorber based on complementary structural graphene |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2018-03-01 |
description |
We present a simple design for a broadband tunable terahertz (THz) metamaterial absorber (MMA) consisting of a complementary cross-oval-shaped graphene (CCOSG) structure and dielectric substrate placed on a continuous metal film. Both numerical simulation and theoretical calculation results indicate that the absorbance is greater than 80% from 1.2 to 1.8 THz, and the corresponding relative bandwidth is up to 40%. Simulated electric field and power loss density distributions reveal that the broadband absorption mainly originates from the excitation of continuous surface plasmon resonance (SPR) on the CCOSG. In addition, the MMA is polarization-insensitive for both transverse-electric (TE) and transverse-magnetic (TM) modes due to the geometry rotational symmetry of the unit-cell structure. Furthermore, the broadband absorption properties of the designed MMA can be effectively tunable by varying the geometric parameters of the unit-cell and chemical potential of graphene. Our results may find promising applications in sensing, detecting, and optoelectronic-related devices. |
topic |
terahertz metamaterial absorber graphene broadband tunable absorption surface plasmon resonances |
url |
http://www.mdpi.com/1996-1944/11/4/540 |
work_keys_str_mv |
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