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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 21 — Oct. 13, 2008
  • pp: 16867–16876

Optically bifacial thin-film wire-grid polarizers with nano-patterns of a graded metal-dielectric composite layer

Jong Hyuk Lee, Young-Woo Song, Joon-gu Lee, Jaeheung Ha, Kyu H. Hwang, and Dong-Sik Zang  »View Author Affiliations


Optics Express, Vol. 16, Issue 21, pp. 16867-16876 (2008)
http://dx.doi.org/10.1364/OE.16.016867


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Abstract

We report on the concept of a thin film wire-grid polarizer (WGP) with optically dual characteristics by introducing a nano-patterned graded metal-dielectric composite-material layer. The Ti-SiO2 composite layer with a depth profile of a gradually-varied composition ratio shows an absorptive feature due to the elimination of an optical interface between a metal and a glass substrate, while the metal side of the WGP gives a reflective character. The unprecedented optically-bifacial thin-film WGP with the 144 nm-period straight-line patterns of a 100 nm-thick Ti-SiO2 composite layer and a 185 nm-thick Al layer shows the exceptionally low reflectance below 15 % from the absorptive side and the high polarization extinction ratio (PER) of over 500 at 550 nm, which is acceptable for use as various display applications such as AMOLEDs and LCDs.

© 2008 Optical Society of America

OCIS Codes
(230.1950) Optical devices : Diffraction gratings
(230.3120) Optical devices : Integrated optics devices
(160.1245) Materials : Artificially engineered materials
(220.4241) Optical design and fabrication : Nanostructure fabrication
(130.5440) Integrated optics : Polarization-selective devices

ToC Category:
Optical Devices

History
Original Manuscript: June 25, 2008
Revised Manuscript: September 12, 2008
Manuscript Accepted: October 3, 2008
Published: October 8, 2008

Citation
Jong Hyuk Lee, Young-Woo Song, Kyu H. Hwang, Joon-gu Lee, Jaeheung Ha, and Dong-Sik Zang, "Optically bifacial thin-film wire-grid polarizers with nano-patterns of a graded metal-dielectric composite layer," Opt. Express 16, 16867-16876 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-21-16867


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