Tunable bifunctional terahertz metamaterial device based on Dirac semimetals and vanadium dioxide | Zendy

Tongling Wang | Zendy; Huiyun Zhang | Zendy; Yong Zhang | Zendy; Yuping Zhang | Zendy; Maoyong Cao | Zendy

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Tunable bifunctional terahertz metamaterial device based on Dirac semimetals and vanadium dioxide

Author(s) -

Tongling Wang,

Huiyun Zhang,

Yong Zhang,

Yuping Zhang,

Maoyong Cao

Publication year - 2020

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.394784

Subject(s) - terahertz radiation , metamaterial , materials science , optoelectronics , bifunctional , optics , terahertz spectroscopy and technology , split ring resonator , physics , biochemistry , chemistry , catalysis

A tunable bifunctional terahertz (THz) metamaterial device based on Dirac semimetal films (DSFs) and VO 2 is presented. The insulator-to-metal phase transition of VO 2 enables bifunctional asymmetric transmission and dual-directional absorption to be switched in the THz range. When VO 2 serves as a dielectric, tunable broadband asymmetric transmission of linearly polarized THz waves can be achieved. When VO 2 is in a metallic state, the proposed device acts as a tunable dual-directional absorber with perfect absorption in both illumination directions. In each case, the response can be tuned by varying the Fermi energy of the DSFs. This offers a new pathway for the development of tunable multifunctional THz metamaterial devices.

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