Hybrid metamaterial switching for manipulating chirality based on VO2 phase transition.
Sci Rep
; 6: 23186, 2016 Mar 22.
Article
en En
| MEDLINE
| ID: mdl-27000427
ABSTRACT
Polarization manipulations of electromagnetic waves can be obtained by chiral and anisotropic metamaterials routinely, but the dynamic and high-efficiency modulations of chiral properties still remain challenging at the terahertz range. Here, we theoretically demonstrate a new scheme for realizing thermal-controlled chirality using a hybrid terahertz metamaterial with embedded vanadium dioxide (VO2) films. The phase transition of VO2 films in 90° twisted E-shaped resonators enables high-efficiency thermal modulation of linear polarization conversion. The asymmetric transmission of linearly polarized wave and circular dichroism simultaneously exhibit a pronounced switching effect dictated by temperature-controlled conductivity of VO2 inclusions. The proposed hybrid metamaterial design opens exciting possibilities to achieve dynamic modulation of terahertz waves and further develop tunable terahertz polarization devices.
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MEDLINE
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En
Revista:
Sci Rep
Año:
2016
Tipo del documento:
Article
País de afiliación:
China