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5039115 
Journal Article 
Terahertz absorber with reconfigurable bandwidth based on isotropic vanadium dioxide metasurfaces 
Song, Z; Wei, M; Wang, Z; Cai, G; Li, Y; Zhou, Y 
2019 
1 
I E E E Photonics Journal
ISSN: 1943-0655 
11 
2 
English 
WOS:000460321400001 
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 2000 Ω -1 cm -1 , 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 10 Ω -1 cm -1 to 2000 Ω -1 cm -1 . The designed absorber may have useful applications in terahertz spectrum such as energy harvesting, thermal emitter, and sensing. 
Absorber; metasurface; vanadium oxide