Subwavelength metallic gratings as an integrated device: Polarized color filter

Nghia Nguyen-Huu, Yu-Lung Lo, Yu Bin Chen, Tsai Yu Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)


Subwavelength metallic gratings were proposed as integrated polarized-RGB (red, green, and blue) color filters here and their performance was further numerically optimized with the rigorous coupled-wave analysis (RCWA) method and the genetic algorithm (GA). Grating types include the single-layer type and the double-layer one while parameters to be optimized are the period, filling factor, and thickness of each layer. The ideal performance is defined both by the large extinction ratio over the visible range and by the high transmittance aiming at wavelengths of 700 nm (R), 546.1 nm (G), and 435.8 nm (B). Results showed that a double-layer grating achieves about 50% transmission efficiency and a large extinction ratio (60dB), which are better than those in previous studies. If the proposed design can integrate with popular liquid crystal display panels, a promising way can be paved to reduce the volume and cost of display electronics.

Original languageEnglish
Title of host publicationOptical Components and Materials VIII
Publication statusPublished - 2011 May 2
EventOptical Components and Materials VIII - San Francisco, CA, United States
Duration: 2011 Jan 252011 Jan 26

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherOptical Components and Materials VIII
CountryUnited States
CitySan Francisco, CA

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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