Journal
NANOSCALE RESEARCH LETTERS
Volume 14, Issue 1, Pages -Publisher
SPRINGEROPEN
DOI: 10.1186/s11671-019-3182-9
Keywords
Metamaterial absorber; Two-dimensional material; Dual-band absorber; Surface plasmons
Funding
- National Natural Science Foundation of China [51702271]
- Young and Middle-aged Teachers Education and Scientific Research Foundation of Fujian Province, China [JAT170407]
- High Level Talent Project of Xiamen University of Technology, China [YKJ16016R]
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We 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.
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