title: Fabrication of twisted nematic structure and vector grating cells by one-step exposure on photocrosslinkable polymer liquid crystals.
abstract: We present a simple yet efficient method to automatically fabricate the twisted nematic structure by one-step exposure on an empty glass cell coated with photocrosslinkable polymer liquid crystal (PCLC) films. The resultant photoalignment directions of two substrates can be orthogonal to each other by controlling the difference between the exposure energy for upper and lower PCLC films and the twisted nematic (TN) structure can be automatically fabricated. The vector grating liquid crystalline cell with TN structure was also fabricated by means of a developed method, and the diffraction properties were well explained by the theoretical calculation on the basis of Jones calculus.
authors.affiliation: Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka, Niigata, Japan.
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Kuzuwata
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Sasaki
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Kawatsuki
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ono