Journal
JOURNAL OF OPTICS
Volume 16, Issue 12, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/16/12/125108
Keywords
wideband absorption; fibonacci quasi-periodic; graphene-based hyperbolic metamaterials
Categories
Funding
- China for the Doctoral Program of Higher Education [20123218110017]
- Jiangsu Province Science Foundation [BK2011727]
- Natural Science Foundation of China [61307052]
- Foundation of Aeronautical Science [20121852030]
- Fundamental Research Funds for the Central Universities [NZ2013302]
- Youth Funding for Science & Technology Innovation in NUAA [NS2014039]
- Open Research Program in Jiangsu Key Laboratory of Meteorological Observation and Information Processing [KDXS1207]
- Jiangsu Innovation Program for Graduate Education [CXZZ13_0166]
- Huangshan University Program for Scientific Research [2010xkj006]
- Anhui for Scientific Research [KJ2013B267]
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A heterostructure containing a Fibonacci quasi-periodic layer and a resonant metal back reflector is proposed, which can realize wideband absorption. The Fibonacci layer is composed of graphene-based hyperbolic metamaterials and isotropic media to obtain wideband absorption. To enhance absorption, an impedance-matching layer is put on top of the Fibonacci layer. It is shown to absorb roughly 90% of all available electromagnetic waves in an 11 terahertz absorption bandwidth for a transverse magnetic mode at normal angle incidence. The absorption bandwidth is affected by the reflection band gap. Compared with some previous designs, our proposed structure has a larger absorption bandwidth and higher absorption in the mid-infrared range. The results should be valuable in the design of infrared stealth and broadband optoelectronic devices.
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