Tunable and polarization-sensitive graphene-based terahertz absorber with eight absorption bands
- Resource Type
- Authors
- Hongyi Zhang; Yuanguo Zhou; Yijun Cai; Feng Lin; Yi Wang; Chengying Chen; Yongbo Guo; Shikai Zuo
- Source
- Journal of Physics D: Applied Physics. 54:195106
- Subject
- Materials science
Acoustics and Ultrasonics
Graphene
business.industry
Terahertz radiation
Condensed Matter Physics
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
law.invention
Polarization sensitive
law
Optoelectronics
business
Absorption (electromagnetic radiation)
- Language
- ISSN
- 1361-6463
0022-3727
A metamaterial absorber consisting of stacked and orthogonal elliptical graphene layers is proposed to achieve eight absorption bands in the terahertz (THz) frequency range. By adjusting the length of the short or long axis for each graphene ellipse, the corresponding absorption peak can be tuned independently. Electric field distributions are present to reveal the physical mechanism. The absorption spectrum can also be tuned by varying the chemical potential of each graphene ellipse and the manipulation for the polarization angle of the incidence. Moreover, the absorber can work properly under oblique incidences. Our work paves a way for designing tunable THz absorbers with numerous absorption bands.