期刊
CHINESE PHYSICS LETTERS
卷 32, 期 6, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0256-307X/32/6/068101
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资金
- National Natural Science Foundation of China [61001018]
- Natural Science Foundation of Shandong Province [ZR2012FM011]
- Shandong-Provincial Higher Educational Science and Technology Program [J11LG20]
- Qingdao City Innovative Leading Talent Plan [13-CX-25]
- THz Science and Technology Foundation of China Academy of Engineering Physics [201401]
- Qingdao Economic and Technical Development Zone Science and Technology Project [2013-1-64]
- Shandong University of Science and Technology Foundation [YC140108]
A graphene-based tunable dual-band metamaterial absorber which is polarization insensitive is numerically proposed at mid-infrared frequencies. In numerical simulation the metamaterial absorber exhibits two absorption peaks at the resonance wavelengths of 6.246 mu m and 6.837 mu m when the Fermi level of graphene is fixed at 0.6 eV. Absorption spectra at different Fermi levels of graphene are displayed and tuning functions are discussed in detail. Both the resonance wavelengths of the absorber blue shift with the increase in Fermi level of graphene. Moreover, the surface current distributions on the gold resonator and ground plane at the two resonance wavelengths are simulated to deeply understand the physical mechanism of resonance absorption.
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