title: Thin-film waveguide gyrators: a theoretical analysis.
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.
authors.forename: M J
authors.initials: MJ
authors.lastname: Sun
authors.forename: M W
authors.initials: MW
authors.lastname: Muller
authors.forename: W S
authors.initials: WS
authors.lastname: Chang