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Robust Thin-Film Wire-Grid THz Polarizer Fabricated Via a Low-Cost Approach

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5 Author(s)
Zhe Huang ; Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China ; Hongkyu Park ; Parrott, E.P.J. ; Hau Ping Chan
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A robust thin-film wire-grid terahertz (THz) polarizer was fabricated via a low-cost, mass-producible manufacturing approach. This polarizer is built on a very thin silica layer structurally supported by a silicon substrate. In addition, the metal grating is protected by a polymer thin film, which eliminates the multireflection effect and enhances the robustness of the polarizer for easy packaging. The polarizer can be easily mounted onto a Newport rotation holder for immediate use. A THz time-domain spectrometer is used to characterize its performance, and an excellent agreement is found between the FDTD-simulated results and the experimental results. The polarizer offered 20-40 dB and 0.8 dB of extinction ratio and transmission loss over a frequency range of 0.2-2.0 THz, respectively.

Published in:

Photonics Technology Letters, IEEE  (Volume:25 ,  Issue: 1 )

Date of Publication:

Jan.1, 2013

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