title: High-contrast channel waveguide switch with two sections of a nematic liquid crystal covering.
abstract: Theoretical and experimental results for waveguide modes with a distinctive channel waveguide switching geometry are presented from the viewpoint of improving the switching contrast for hybrid-mode propagation. The channel waveguide structure consists of two types of active material covering regions of a nematic liquid crystal; one has a pair of strip electrodes, and the other is without electrodes. An experimental switch is demonstrated to have the contrast ratio of 1430 for the hybrid modes with E(1n)(y) primary components.
authors.forename: B X
authors.initials: BX
authors.lastname: Chen
authors.forename: X T
authors.initials: XT
authors.lastname: Li
authors.forename: Y
authors.initials: Y
authors.lastname: Limura
authors.forename: S
authors.initials: S
authors.lastname: Kobayashi