title: Hybrid metamaterial switching for manipulating chirality based on VO2 phase transition.
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.
authors.affiliation: Key Laboratory of In-Fiber Integrated Optics of Ministry of Education, College of Science, Harbin Engineering University, Harbin 150001, China.|School of Electronic Science, Northeast Petroleum University, Daqing 163318, China.
authors.forename: T T
authors.initials: TT
authors.lastname: Lv
authors.affiliation: Key Laboratory of In-Fiber Integrated Optics of Ministry of Education, College of Science, Harbin Engineering University, Harbin 150001, China.
authors.forename: Y X
authors.initials: YX
authors.lastname: Li
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.
authors.forename: H F
authors.initials: HF
authors.lastname: Ma
authors.affiliation: Key Laboratory of In-Fiber Integrated Optics of Ministry of Education, College of Science, Harbin Engineering University, Harbin 150001, China.
authors.forename: Z
authors.initials: Z
authors.lastname: Zhu
authors.affiliation: Key Laboratory of In-Fiber Integrated Optics of Ministry of Education, College of Science, Harbin Engineering University, Harbin 150001, China.
authors.forename: Z P
authors.initials: ZP
authors.lastname: Li
authors.affiliation: Key Laboratory of In-Fiber Integrated Optics of Ministry of Education, College of Science, Harbin Engineering University, Harbin 150001, China.
authors.forename: C Y
authors.initials: CY
authors.lastname: Guan
authors.affiliation: Key Laboratory of In-Fiber Integrated Optics of Ministry of Education, College of Science, Harbin Engineering University, Harbin 150001, China.|SZU-NUS Collaborative Innovation Centre for Optoelectronic Science &Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China.
authors.forename: J H
authors.initials: JH
authors.lastname: Shi
authors.affiliation: SZU-NUS Collaborative Innovation Centre for Optoelectronic Science &Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China.
authors.forename: H
authors.initials: H
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.
authors.forename: T J
authors.initials: TJ
authors.lastname: Cui