期刊
SCIENTIFIC REPORTS
卷 5, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep18463
关键词
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资金
- Los Alamos National Laboratory LDRD program
- National Nuclear Security Administration of the U.S. Department of Energy [DE-AC52-06NA25396]
- Natural Science Foundation of Shandong Province, China [ZR2012FM011]
- Qingdao city innovative leading talent plan [13-CX-25]
- CAEP THz Science and Technology Foundation [201401]
- Qingdao Economic & Technical Development Zone Science & Technology Project [2013-1-64]
- Shandong University of Science and Technology Foundation, China [YC140108]
- China Scholarship Council
We design a dual-band absorber formed by combining two cross-shaped metallic resonators of different sizes within a super-unit-cell arranged in mirror symmetry. Simulations indicate that absorption efficiencies greater than 99% can be achieved at two different frequencies under normal incidence. We employ a design scheme with graphene integration, which allows independent tuning of individual absorption frequencies by electrostatically changing the Fermi energy of the graphene layer. High absorbance is maintained over a wide incident angle range up to 50 degrees for both TE and TM polarizations. It thus enables a promising way to design electrically tunable absorbers, which may contribute toward the realization of frequency selective detectors for sensing applications.
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