Extremely high extinction ratio terahertz broadband polarizer using bilayer subwavelength metal wire-grid structure

Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.4729826

Title:	Extremely high extinction ratio terahertz broadband polarizer using bilayer subwavelength metal wire-grid structure
Authors:	Deng, L.Y. Teng, J.H. Zhang, L. Wu, Q.Y. Liu, H. Zhang, X.H. Chua, S.J.
Issue Date:	2-Jul-2012
Citation:	Deng, L.Y., Teng, J.H., Zhang, L., Wu, Q.Y., Liu, H., Zhang, X.H., Chua, S.J. (2012-07-02). Extremely high extinction ratio terahertz broadband polarizer using bilayer subwavelength metal wire-grid structure. Applied Physics Letters 101 (1) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.4729826
Abstract:	We report a broadband terahertz (THz) polarizer exhibiting extremely high polarization extinction ratio and the method to fabricate it. The polarizer consists of a bilayer subwavelength Au wire-grid structure fabricated on Si substrate by one step etching and metal formation. The THz time domain spectroscopy (THz-TDS) measurement reveals an extremely high extinction ratio of 84.9 dB at 1.67 THz, close to the detection limit of THz-TDS system, and an average extinction ratio of 69.9 dB in 0.6-3 THz frequency range. The fabricated bilayer wire-grid polarizer shows greatly enhanced performance over conventional single layer wire-grid THz polarizer. © 2012 American Institute of Physics.
Source Title:	Applied Physics Letters
URI:	http://scholarbank.nus.edu.sg/handle/10635/55981
ISSN:	00036951
DOI:	10.1063/1.4729826
Appears in Collections:	Staff Publications

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