Title :
A Numerical Study on Helix Nanowire Metamaterials as Optical Circular Polarizers in the Visible Region
Author :
Yang, Z.Y. ; Zhao, M. ; Lu, P.X.
Author_Institution :
Wuhan Nat. Lab. for Optoelectron., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
Broadband optical circular polarizers functioning in the visible region were developed based on structural design and numerical simulation using the finite-difference time-domain method. By properly selecting the parameters of helix nanowire metamaterials including metal materials, diameters of wires, numbers of helix-period, spacing of grids, lengths of helix-period, and diameters of helixes, we proposed a broadband optical circular polarizer using aluminium helix nanowire metamaterials on a silica substrate. The proposed polarizer can reach an extinction ratio above 39 : 1 and a transmission efficiency above 64% in the range from 410 to 790 nm.
Keywords :
aluminium; finite difference methods; integrated optics; metamaterials; nanophotonics; nanowires; optical polarisers; Al; broadband optical circular polarizer; finite difference time-domain method; helix nanowire metamaterial; structural design; visible region; wavelength 410 nm to 790 nm; Aluminum; Finite difference methods; Inorganic materials; Metamaterials; Numerical simulation; Optical design; Optical materials; Optical polarization; Time domain analysis; Wires; Optical polarization; superlattices;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2054073
