An integrated polarized light guide was designed and fabricated for use as a liquid-crystal backlight with emphasis on uniformity of the light and conversion of p-polarized to s-polarized light. Two different micro-optical structures were fabricated both on the top and the bottom surfaces of the light guide. On the top surface, a subwavelength grating separates s-polarized and p-polarized light to achieve a polarization-conversion efficiency of 69%. A 1.7 gain factor of polarization efficiency was obtained to increase the utility of light for liquid-crystal illumination.
© 2004 Optical Society of America
(260.1440) Physical optics : Birefringence
Original Manuscript: August 26, 2003
Revised Manuscript: December 2, 2003
Published: March 20, 2004
Ko-Wei Chien and Han-Ping D. Shieh, "Design and fabrication of an integrated polarized light guide for liquid-crystal-display illumination," Appl. Opt. 43, 1830-1834 (2004)