Design and simulation of a polarized color filter based on sub-wavelength metal gratings

Yueyu Zhang; Yun Zhou; Linsen Chen

doi:10.1117/12.870468

17 November 2010 Design and simulation of a polarized color filter based on sub-wavelength metal gratings

Yueyu Zhang, Yun Zhou, Linsen Chen

Proceedings Volume 7848, Holography, Diffractive Optics, and Applications IV; 78482U (2010) https://doi.org/10.1117/12.870468
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

A polarized color filter with good performance is proposed. This device consists of a transparent substrate, a bottom metal grating, a low refractive index dielectric layer, a high refractive index dielectric layer and a top metal grating. The bottom metal grating has a small period which is mainly for polarization, and the top metal grating with a large period is for color-filtering. The parameters that affect the transmission and polarization properties of the device have been simulated and analyzed by utilizing the finite-difference time-domain (FDTD) method. A polarized color filter having broadband peak, high transmission and high extinction ratio is designed. The peak wavelengths and the corresponding transmittances are as follows: 635nm and 78.7% for red, 541nm and 83.2% for green, 452nm and 82.4% for blue. Extinction ratio above 1000:1 has been achieved within the full width at half maximum (FWHM) range for all the three colors. This device is suitable for liquid crystal displays.

Citation Download Citation

Yueyu Zhang, Yun Zhou, and Linsen Chen "Design and simulation of a polarized color filter based on sub-wavelength metal gratings", Proc. SPIE 7848, Holography, Diffractive Optics, and Applications IV, 78482U (17 November 2010); https://doi.org/10.1117/12.870468

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