Designs and Simulations of Low Sideband Guided-Mode Resonant Color Filters
Date Issued
2016
Date
2016
Author(s)
Ho, Sheng-Da
Abstract
In this thesis, we are going to design the multilayer anti-reflective coatings with broad bandwidth, combine the multilayer anti-reflective coatings with guided-mode resonant filter, and design the filter which is highly reflective at the center wavelength, but nearly zero reflective at the sideband. In order to keep low reflectance in broad bandwidth, we add absentee layer into the anti-reflective coatings, then calculate the effective refractive index of the structure and set the period of the gratings. To prevent multiple modes from appearing at visible light (400nm to 700nm,) we adjust the thickness of the structure, so there is only one mode at visible light (400nm to 700nm.) For the purpose of increasing the FWHM (Full width at half maximum) of reflectance, we analyze the structure which is the most suitable of the color filters, and decide to use two layers of gratings, which is staggered to each other. After deciding the structure and parameters of the color filters, we are going to analyze how incident angle, the grating thickness, duty cycle and displacement of the grating affect the reflectance of the color filter, and design three different structures corresponded to primary colors of light. At the end, we will calculate the color saturation of the color filters, and compare them to the standard of saturation of the monitors.
Subjects
anti-reflective coating
guided-mode resonant filter
low sideband
color filter
color saturation
Type
thesis
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