Modified Bragg Reflection Waveguides with Binary and Ternary Claddings

Waveguides with additional layers between hollow core and periodic binary and ternary structure are considered. On the base of dispersion equation solutions dispersion diagrams are calculated. Spatial field distributions are built for different additional layers permittivity values. It is shown that waveguide with ternary cladding has wider possibility for tuning than binary ones. Permittivity changing makes possible to almost double times increasing of the field amplitude in the central part of the channel. This feature can be useful for interaction with sheet electron beams.