Design of wire-grid polarizer with effective medium theory |
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| Authors: | Yan-Lin Liao Yan Zhao |
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| Institution: | 1. Key Lab of Opto-electronic Information Acquisition and Manipulation, Ministry of Education, Anhui University, Hefei, 230039, People’s Republic of China
2. Department of Physics, Anhui Medical University, Hefei, 230032, People’s Republic of China
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| Abstract: | A design concept of a wire-grid polarizer, which is based on the effective-medium theory, has been proposed. The effective indices of a wire-grid grating are evaluated with the effective-medium theory. The results show that, the wire-grid grating acts as a metal for TE polarization, but it behaves like a dielectric material for TM polarization. According to the different effective optical properties of the wire-grid grating for the different polarizations, a wire-grid polarizer with a high polarization ratio can be obtained by enhancing both the transmission for TM polarization and the reflection for TE polarization. |
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