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High-contrast channel waveguide switch with two sections of a nematic liquid crystal covering

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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 E1ny primary components.

© 1993 Optical Society of America

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