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A Numerical Study on Helix Nanowire Metamaterials as Optical Circular Polarizers in the Visible Region

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3 Author(s)
Z. Y. Yang ; Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei, China ; M. Zhao ; P. X. Lu

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.

Published in:

IEEE Photonics Technology Letters  (Volume:22 ,  Issue: 17 )