期刊
JOURNAL OF MODERN OPTICS
卷 63, 期 3, 页码 200-206出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09500340.2015.1073803
关键词
terahertz; graphene; metamaterial; bio-sensing
类别
资金
- National Basic Research Program of China (973) [2014CB339802, 2015CB755403]
- National Natural Science Foundation of China [61271066]
A polarization-independent terahertz metamaterial based on hybrid graphene-gold structure with excellent refractive index sensing characteristics is proposed. The proposed structure exhibits a sharply narrow plasmon-induced transparency peak in the transmission spectrum at the terahertz regime. Obvious frequency shift in the transparency peak can be observed by varying the surrounding medium's refractive index or the Fermi level in graphene, which can be well applied in bio-sensing technology. Moreover, an electrical RLC circuit model is used to provide a reasonable explanation for the optical response process in the proposed structure. Our work can offer reference value for the application of graphene technology as well as new idea for designing novel biosensors.
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