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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 4 — Feb. 1, 2011
  • pp: 415–426

Realization of integrated polarizer and color filters based on subwavelength metallic gratings using a hybrid numerical scheme

Nghia Nguyen-Huu, Yu-Lung Lo, Yu-Bin Chen, and Tsai-Yu Yang  »View Author Affiliations


Applied Optics, Vol. 50, Issue 4, pp. 415-426 (2011)
http://dx.doi.org/10.1364/AO.50.000415


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Abstract

This study realizes integrated polarizer and RGB (red, green, and blue) color filters using single- and multiple-layered subwavelength metallic grating structures. A hybrid numerical scheme based on the rigorous coupled-wave analysis method and a genetic algorithm is used to determine the optimal values of the grating period, filling factor, and grating thickness of three different grating structures, namely, a single-layer grating, a double-layer grating, and a double-layer grating with a lateral shift. The optical performance of the various structures is evaluated and compared in terms of the transmission efficiency at the center wavelengths 700.0 nm , 546.1 nm , and 435.8 nm of red, green, and blue light, respectively, and the extinction ratio over the visible wavelength spectrum ( 380 780 nm ). It is shown that the double-layer grating achieves a transmission efficiency of about 50% and an extinction ratio of around 60 dB . Thus, this grating structure provides a convenient and effective means of achieving the polarizing and filtering functions in LCD panels using a single device.

© 2011 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(230.3720) Optical devices : Liquid-crystal devices
(230.5440) Optical devices : Polarization-selective devices
(050.6624) Diffraction and gratings : Subwavelength structures
(230.7408) Optical devices : Wavelength filtering devices

ToC Category:
Diffraction and Gratings

History
Original Manuscript: October 19, 2010
Manuscript Accepted: December 5, 2010
Published: January 26, 2011

Citation
Nghia Nguyen-Huu, Yu-Lung Lo, Yu-Bin Chen, and Tsai-Yu Yang, "Realization of integrated polarizer and color filters based on subwavelength metallic gratings using a hybrid numerical scheme," Appl. Opt. 50, 415-426 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-4-415


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