title: Active tunable plasmonically induced polarization conversion in the THz regime.
abstract: A plasmon-induced polarization conversion (PIPC) structure based on periodically patterned graphene was demonstrated in the THz regime. By varying the Fermi level of two connected T-shape graphene strips through the electrostatic gating, the peak frequency and the group index in the transparency window can be tuned, which is good agreement with the coupled Lorentz oscillator model. Due to interference between two polarization selective graphene plasmonic resonances coexisting in the planar metamaterial, polarization conversion can be achieved. The linearly polarized THz wave can be converted to elliptically and right circularly polarized THz wave through varying the relaxation time of electrons in graphene. This novel chip-scale active terahertz device promises essential application opportunities in terahertz sensing and terahertz communications.
authors.affiliation: Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.|School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.
authors.forename: Furi
authors.initials: F
authors.lastname: Ling
authors.affiliation: Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Yao
authors.affiliation: Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.|College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China.
authors.forename: Jianquan
authors.initials: J
authors.lastname: Yao