title: Color-temperature tunable white reflector using bichiral liquid crystal films.
abstract: 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.
authors.affiliation: Department of Physics and Division of Energy Systems Research, Ajou University 443-749, Suwon, Korea. nyha@ajou.ac.kr
authors.forename: Na Young
authors.initials: NY
authors.lastname: Ha
authors.forename: Soon Moon
authors.initials: SM
authors.lastname: Jeong
authors.forename: Suzushi
authors.initials: S
authors.lastname: Nishimura
authors.forename: Hideo
authors.initials: H
authors.lastname: Takezoe
mesh_terms: D003116:Color; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007909:Lenses; D050866:Liquid Crystals / Q000737:chemistry*; D010783:Photometry / Q000295:instrumentation*; D013696:Temperature