Terahertz Absorber With Reconfigurable Bandwidth Based on Isotropic Vanadium Dioxide Metasurfaces
The design of a broadband tunable absorber is proposed based on a thin vanadium dioxide metasurface, which is composed of a simple array of vanadium dioxide and a bottom gold film. When the conductivity of vanadium dioxide is equal to <inline-formula><tex-math notation="LaTeX">...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2019-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8649647/ |
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| Summary: | The design of a broadband tunable absorber is proposed based on a thin vanadium dioxide metasurface, which is composed of a simple array of vanadium dioxide and a bottom gold film. When the conductivity of vanadium dioxide is equal to <inline-formula><tex-math notation="LaTeX">$\text{2000}\ {\Omega ^{ - 1}}{\text{cm}^{ - 1}}$</tex-math></inline-formula>, simulated absorptance exceeds 90% with 71% bandwidth from 0.47 to 0.99 THz and full width at half maximum is 98% from 0.354 to 1.036 THz with center frequency of 0.695 THz. Simulated results show that absorptance peak can be tuned from 5% to 100% when the conductivity changes continually from <inline-formula><tex-math notation="LaTeX">$\text{10}\ {\Omega ^{ - 1}}{\text{cm}^{ - 1}}$</tex-math></inline-formula> to <inline-formula><tex-math notation="LaTeX">$\text{2000}\ {\Omega ^{ - 1}}{\text{cm}^{ - 1}}$</tex-math></inline-formula>. The designed absorber may have useful applications in terahertz spectrum such as energy harvesting, thermal emitter, and sensing. |
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| ISSN: | 1943-0655 |