Open AccessReflection color filters of the three primary colors with wide viewing angles using common-thickness silicon subwavelength gratings
Author(s) -
Yoshiaki Kanamori,
Toshikazu Ozaki,
Kazuhiro Hane
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.025663
Subject(s) - optics , grating , materials science , color filter array , color gel , primary color , silicon , reflection (computer programming) , optical filter , substrate (aquarium) , optoelectronics , layer (electronics) , physics , computer science , oceanography , composite material , programming language , geology , thin film transistor
We fabricated reflection color filters of the three primary colors with wide viewing angles using silicon two-dimensional subwavelength gratings on the same quartz substrate. The grating periods were 400, 340, and 300 nm for red, green, and blue filters, respectively. All of the color filters had the same grating thickness of 100 nm, which enabled simple fabrication of a color filter array. Reflected colors from the red, green, and blue filters under s-polarized white-light irradiation appeared in the respective colors at incident angles from 0 to 50°. By rigorous coupled-wave analysis, the dimensions of each color filter were designed, and the calculated reflectivity was compared with the measured reflectivity.