Plasmonic Absorption Enhancement in Elliptical Graphene Arrays
In this paper, we come up with a wavelength tunable absorber which is made up of periodically elliptical graphene arrays in the far-infrared and terahertz regions. Through simulation, we find that we can increase the length of long axis of the ellipse, raise the incidence angles of TM- and TE-polari...
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doaj-9cfbf7e618d141a595f816c8a393e2572020-11-24T22:37:17ZengMDPI AGNanomaterials2079-49912018-03-018317510.3390/nano8030175nano8030175Plasmonic Absorption Enhancement in Elliptical Graphene ArraysJiajia Chen0Yu Zeng1Xibin Xu2Xifang Chen3Zigang Zhou4Pengcheng Shi5Zao Yi6Xin Ye7Shuyuan Xiao8Yougen Yi9School of Science, Southwest University of Science and Technology, Mianyang 621010, ChinaSchool of Science, Southwest University of Science and Technology, Mianyang 621010, ChinaResearch Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, ChinaSchool of Science, Southwest University of Science and Technology, Mianyang 621010, ChinaSchool of Science, Southwest University of Science and Technology, Mianyang 621010, ChinaSchool of Science, Southwest University of Science and Technology, Mianyang 621010, ChinaSchool of Science, Southwest University of Science and Technology, Mianyang 621010, ChinaResearch Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, ChinaCollege of Physics and Electronics, Central South University, Changsha 410083, ChinaIn this paper, we come up with a wavelength tunable absorber which is made up of periodically elliptical graphene arrays in the far-infrared and terahertz regions. Through simulation, we find that we can increase the length of long axis of the ellipse, raise the incidence angles of TM- and TE-polarization (TM- and TE-polarization indicate the direction of the incident electric field along the direction of the x and the y axis, respectively.) within certain limits, and increase the chemical potential of graphene, so as to enhance the absorption of light in the elliptical graphene arrays. We also compare the absorption spectra of the original structure and the complementary structure, and find that the absorption of the original structure is higher than that of the complementary structure. In the end, we study the changes in the absorption rate of the double layer structure of the elliptical array with the increase in the thickness of SiO2. The elliptical array structure can be applied to tunable spectral detectors, filters and sensors at far-infrared and terahertz wavelengths.http://www.mdpi.com/2079-4991/8/3/175graphene surface plasmonmetamaterialsabsorption enhancementFDTD method |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jiajia Chen Yu Zeng Xibin Xu Xifang Chen Zigang Zhou Pengcheng Shi Zao Yi Xin Ye Shuyuan Xiao Yougen Yi |
spellingShingle |
Jiajia Chen Yu Zeng Xibin Xu Xifang Chen Zigang Zhou Pengcheng Shi Zao Yi Xin Ye Shuyuan Xiao Yougen Yi Plasmonic Absorption Enhancement in Elliptical Graphene Arrays Nanomaterials graphene surface plasmon metamaterials absorption enhancement FDTD method |
author_facet |
Jiajia Chen Yu Zeng Xibin Xu Xifang Chen Zigang Zhou Pengcheng Shi Zao Yi Xin Ye Shuyuan Xiao Yougen Yi |
author_sort |
Jiajia Chen |
title |
Plasmonic Absorption Enhancement in Elliptical Graphene Arrays |
title_short |
Plasmonic Absorption Enhancement in Elliptical Graphene Arrays |
title_full |
Plasmonic Absorption Enhancement in Elliptical Graphene Arrays |
title_fullStr |
Plasmonic Absorption Enhancement in Elliptical Graphene Arrays |
title_full_unstemmed |
Plasmonic Absorption Enhancement in Elliptical Graphene Arrays |
title_sort |
plasmonic absorption enhancement in elliptical graphene arrays |
publisher |
MDPI AG |
series |
Nanomaterials |
issn |
2079-4991 |
publishDate |
2018-03-01 |
description |
In this paper, we come up with a wavelength tunable absorber which is made up of periodically elliptical graphene arrays in the far-infrared and terahertz regions. Through simulation, we find that we can increase the length of long axis of the ellipse, raise the incidence angles of TM- and TE-polarization (TM- and TE-polarization indicate the direction of the incident electric field along the direction of the x and the y axis, respectively.) within certain limits, and increase the chemical potential of graphene, so as to enhance the absorption of light in the elliptical graphene arrays. We also compare the absorption spectra of the original structure and the complementary structure, and find that the absorption of the original structure is higher than that of the complementary structure. In the end, we study the changes in the absorption rate of the double layer structure of the elliptical array with the increase in the thickness of SiO2. The elliptical array structure can be applied to tunable spectral detectors, filters and sensors at far-infrared and terahertz wavelengths. |
topic |
graphene surface plasmon metamaterials absorption enhancement FDTD method |
url |
http://www.mdpi.com/2079-4991/8/3/175 |
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