Open AccessColor-temperature tunable white reflector using bichiral liquid crystal films
Author(s) -
Na Young Ha,
Soon Moon Jeong,
Suzushi Nishimura,
Hideo Takezoe
Publication year - 2010
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.026339
Subject(s) - liquid crystal , optics , materials science , cholesteric liquid crystal , standard illuminant , white light , polarization (electrochemistry) , isotropy , liquid crystal display , optoelectronics , planar , physics , chemistry , computer graphics (images) , computer science
We have demonstrated multicolored reflections showing various whitish colors from a bichiral liquid crystal (LC) film. The bichiral LC film was fabricated by using left-handed and right-handed polymeric cholesteric liquid crystal (CLC) films with two different helical pitches and an isotropic polymer film in between. Color temperatures of the multiple reflections are controlled from ~4000 K to ~10000 K by changing linear polarization directions of normally incident and reflected lights. This characteristic can extend practical applications of CLCs to illuminant devices.