title: Singular observation of the polarization-conversion effect for a gammadion-shaped metasurface.
abstract: In this article, the polarization-conversion effects of a gammadion-shaped metasurface in transmission and reflection modes are discussed. In our experiment, the polarization-conversion effect of a gammadion-shaped metasurface is investigated because of the contribution of the phase and amplitude anisotropies. According to our experimental and simulated results, the polarization property of the first-order transmitted diffraction is dominated by linear anisotropy and has weak depolarization; the first-order reflected diffraction exhibits both linear and circular anisotropies and has stronger depolarization than the transmission mode. These results are different from previously published research. The Mueller matrix ellipsometer and polar decomposition method will aid in the investigation of the polarization properties of other nanostructures.
authors.affiliation: Department of Mechanical Engineering, National Chin-Yi University of Technology, Taichung 411, Taiwan.
authors.forename: Chu-En
authors.initials: CE
authors.lastname: Lin
authors.affiliation: Department of Material Science and Engineering, National Tsing Hua University 300 Hsinchu, Taiwan.
authors.forename: Ta-Jen
authors.initials: TJ
authors.lastname: Yen
authors.affiliation: Graduate Institute of Electro-Optical Engineering, Chang Gung University 333 Taoyuan, Taiwan.
authors.forename: Chih-Jen
authors.initials: CJ
authors.lastname: Yu
authors.affiliation: Graduate Institute of Electro-Optical Engineering, Chang Gung University 333 Taoyuan, Taiwan.
authors.forename: Cheng-Min
authors.initials: CM
authors.lastname: Hsieh
authors.affiliation: Department of Material Science and Engineering, National Tsing Hua University 300 Hsinchu, Taiwan.
authors.forename: Min-Han
authors.initials: MH
authors.lastname: Lee
authors.affiliation: Department of Optics and Photonics, National Central University 320 Taoyuan, Taiwan.
authors.forename: Chii-Chang
authors.initials: CC
authors.lastname: Chen
authors.affiliation: Department of Material Science and Engineering, National Tsing Hua University 300 Hsinchu, Taiwan.
authors.forename: Cheng-Wei
authors.initials: CW
authors.lastname: Chang