Open AccessSub-wavelength gratings fabricated on a light bar by roll-to-roll UV embossing process
Author(s) -
Chunwei Liu,
Chi−Hung Lee,
Sung-Chyr Lin
Publication year - 2011
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.19.011299
Subject(s) - optics , backlight , materials science , grating , rigorous coupled wave analysis , wavelength , embossing , roll to roll processing , diffraction grating , illuminance , optoelectronics , ultraviolet , bar (unit) , liquid crystal display , physics , meteorology , metallurgy , composite material
This research uses a roll-to-roll based ultraviolet (UV) resin process to make sub-wavelength gratings for display applications. Based on the rigorous coupling wave analysis (RCWA), we analyze the relationship between the first order transmission/reflection efficiency and the pitch of the grating for various shapes as rays pass through the sub-wavelength gratings, patterned with a backlight. The objective is to turn the R/G/B (620 nm, 520 nm, and 450 nm) incident rays into uniformly and normally output white light with high illuminance from the surface of a light guide.