Abstract
A wide-angle color filter for TE-polarization is proposed based on a guided-mode resonant grating selectively coated with a metal film. The effects of the structure parameters to the resonant transmission characteristics are discussed by the rigorous coupled-wave analysis. Its optimal structure was given for a green color filter with a peak transmission of 77.6%, a full width at half-maximum (FWHM) of , and a good angular tolerance up to . Compared to the similar structure with a nonresonant dielectric grating, it decreases the FWHM effectively for the resonance induced by the guided-mode resonant grating. The numerical results indicate that the designed structure has a good wide-angle transmission performance.
© 2012 Optical Society of America
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