Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 33, Issue 24, Pages 5151-5156Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2015.2497740
Keywords
Metamaterial; multiband absorption; perfect absorber; terahertz
Funding
- Jiangsu provincial Research Center of Light Industrial Optoelectronic Engineering and Technology [BM2014402]
- Fundamental Research Funds for the Central Universities [JUSRP115A13, JUSRP115A14, JUSRP115A15]
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A novel and simple design of five-band terahertz absorber is investigated. This absorber consists of a four-gap comb resonator and a dielectric slab on top of a metallic board. The simulation results show that the structure has five distinct absorption peaks, each with the absorption of over 98%. Multiband absorption property can be explained by the overlapping of the LC resonances, dipolar response, and high-order resonance of the structure. Moreover, the design gives considerable freedom to shift or change the frequencies of the absorber by varying the arm lengths of the comb. The proposed absorber has potential applications in detection, imaging, and sensing.
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