Abstract

A detailed theoretical analysis of thin-film waveguide gyrators is carried out using the coupled-mode theory. The result shows the simplest structure of waveguide gyrators must consist of two different kinds of waveguide mode converters: one with longitudinal (polar) anisotropy, the other with polar (longitudinal) magnetic gyrotropy. A new structure of waveguide gyrator is also proposed here, which uses a nematic liquid crystal in contact with a magnetic garnet film. A 100% conversion length as small as 3 mm can be easily achieved using available materials. Periodic structures must be used for phase matching.

© 1977 Optical Society of America

Wave propagation in semileaky-type anisotropic thin-film optical waveguides

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