期刊
APPLIED OPTICS
卷 52, 期 19, 页码 4536-4540出版社
OPTICAL SOC AMER
DOI: 10.1364/AO.52.004536
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资金
- National Natural Science Foundation of China [61275104, 61036006, 90923028]
- UK EPSRC [EP/J017671/1, EP/H002359/1]
- Engineering and Physical Sciences Research Council [EP/H026622/1, EP/J017671/1] Funding Source: researchfish
- EPSRC [EP/H026622/1, EP/J017671/1] Funding Source: UKRI
We design, fabricate, and characterize dual-band terahertz (THz) metamaterial absorbers with high absorption based on structures consisting of a cobalt silicide (Co-Si) ground plane, a parylene-C dielectric spacer, and a metal top layer. By combining two periodic metal resonators that couple separately within a single unit cell, a polarization-independent absorber with two distinct absorption peaks was obtained. By varying the thickness of the dielectric layer, we obtain absorptivity of 0.76 at 0.76 THz and 0.97 at 2.30 THz, which indicates the Co-Si ground plane absorbers present good performance. (C) 2013 Optical Society of America
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