DocumentCode :
75379
Title :
High Fill-Factor Substrate-Based Wire-Grid Polarizers With High Extinction Ratios
Author :
Middendorf, J.R. ; Cetnar, J.S. ; Owsley, Jack ; Brown, E.R.
Author_Institution :
Dept. of Phys., Wright State Univ., Dayton, OH, USA
Volume :
4
Issue :
3
fYear :
2014
fDate :
May-14
Firstpage :
376
Lastpage :
382
Abstract :
Low-cost, substrate-based, millimeter-wave-to-THz wire-grid polarizers have been fabricated on crystalline-quartz substrates using planar processing techniques. The polarizers achieve high extinction ratios (at least 60 dB) with a single layer, while maintaining low insertion loss (a few decibels) by taking advantage of previously under-utilized “spoof” surface-plasmon effects. Full-wave finite-element simulations done with High Frequency Structure Simulator and experiments both show that metal fill-factors upwards of 90% greatly improve polarizer extinction ratio. The extinction ratio of high fill-factor polarizers exceeds that of a commercial free-standing wire grid by up to 20 dB at normal incidence.
Keywords :
electromagnetic wave polarisation; finite element analysis; frequency selective surfaces; millimetre wave devices; surface plasmons; terahertz wave devices; wires (electric); commercial free-standing wire grid; crystalline-quartz substrates; full-wave finite-element simulations; high extinction ratios; high fill-factor substrate-based wire-grid polarizers; high frequency structure simulator; low insertion loss; low-cost wire-grid polarizers; millimeter-wave-to-THz wire-grid polarizers; planar processing techniques; polarizer extinction ratio; spoof surface-plasmon effects; substrate-based wire-grid polarizers; Aluminum; Extinction ratio; Fabrication; Strips; Substrates; Wires; Extinction ratio; THz; fill-factor (FF); millimeter wave (MMW); polarizer; surface plasmon; wire grid;
fLanguage :
English
Journal_Title :
Terahertz Science and Technology, IEEE Transactions on
Publisher :
ieee
ISSN :
2156-342X
Type :
jour
DOI :
10.1109/TTHZ.2014.2313959
Filename :
6787031
Link To Document :
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