Controllable broadband asymmetric transmission of terahertz wave based on Dirac semimetals | Zendy

Linlin Dai | Zendy; Yuping Zhang | Zendy; John F. O’Hara | Zendy; Huiyun Zhang | Zendy

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Controllable broadband asymmetric transmission of terahertz wave based on Dirac semimetals

Author(s) -

Linlin Dai,

Yuping Zhang,

John F. O’Hara,

Huiyun Zhang

Publication year - 2019

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.27.035784

Subject(s) - semimetal , terahertz radiation , metamaterial , broadband , physics , resonator , optics , polarization (electrochemistry) , dirac (video compression format) , graphene , transmission (telecommunications) , negative refraction , optoelectronics , telecommunications , band gap , quantum mechanics , chemistry , neutrino , computer science

We present a dynamic metamaterial based on Dirac semimetals and capable of realizing broadband and tunable asymmetric transmission in the terahertz region. The Dirac semimetal resonators have a chiral structure patterned with double-T resonators that results in partial polarization conversion of waves incident upon the material, leading to asymmetric transmission across a wide frequency range. We show how the gradual shift of the semimetal Fermi energy permits a method of control over the asymmetric total transmission.

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