title: 90° polarization rotator with rotation angle independent of substrate permittivity and incident angles using a composite chiral metamaterial.
abstract: We propose a more efficient way to obtain much stronger polarization rotatory power by constructing a composite chiral metamaterial (CCMM) which is achieved via the combination of the cut-wire pairs (CWPs) and a purely chiral metamaterial (PCMM) composed of conjugated gammadion resonators. Owing to the strong coupling between the CWPs and PCMM, the polarization rotation in our CCMM is more gigantic than that of the PCMM. Furthermore, the CCMM proposed in this paper can function as a wide-angle 90° polarization rotator for different substrate permittivity without needing to adjust its geometric parameters. Due to the unique properties, the CCMM may greatly benefit potential applications including designing a tunable 90°-polarization rotator, microwave devices, telecommunication, and so on.
authors.affiliation: Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi’an, 710129, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Song
authors.forename: Yahong
authors.initials: Y
authors.lastname: Liu
authors.forename: Quanhong
authors.initials: Q
authors.lastname: Fu
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Zhao
authors.forename: Chunrong
authors.initials: C
authors.lastname: Luo
authors.forename: Weiren
authors.initials: W
authors.lastname: Zhu
mesh_terms: D016880:Anisotropy; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008420:Manufactured Materials; D012031:Refractometry / Q000295:instrumentation* / Q000379:methods*; D012399:Rotation; D012542:Scattering, Radiation