Switchable and tunable metamaterial absorber in THz frequencies
We demonstrated a metamaterial absorber (MMA), which can be controlled by variation of conductivity or temperature. The metamaterial (MM) structure is based on three individual layers of periodic split ring resonator (SRR), a dielectric, and metallic film. The resonant frequency of the designed st...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
ĐHQGHN
2017
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| Subjects: | |
| Online Access: | http://repository.vnu.edu.vn/handle/VNU_123/58329 |
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| Institution: | Vietnam National University, Hanoi |
| Language: | English |
| Summary: | We demonstrated a metamaterial absorber (MMA), which can be controlled by variation of conductivity
or temperature. The metamaterial (MM) structure is based on three individual layers of periodic split ring
resonator (SRR), a dielectric, and metallic film. The resonant frequency of the designed structure is
numerically investigated at THz range of electromagnetic (EM) wave, which is explained by surface
current and equivalent LC-circuit. It was found that by replacing the metallicfilm with VO2, the ab-sorption intensity can be controlled by modification of the conductivity through the optical pumping power, while the absorption frequency is tuned by changing the temperature of InSb materialfilled into two slits of SRR. It is expected that this work will allow switchable and tunable absorption behaviours for applications of MMA |
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