Dielectric multilayer waveguides for TE and TM mode matching

Details Dielectric multilayer waveguides for TE and TM mode matching Dielectric multilayer waveguides for TE and TM mode matching

2003-07-04

arxiv.org/abs/physics/0307035v1

J. Opt. A: Pure Appl. Opt. 5 (2003) 192-198

Physics

Optics

13 pages with figures

Scientific paper

10.1088/1464-4258/5/3/309

We analyse theoretically for the first time to our knowledge the perfect phase matching of guided TE and TM modes with a multilayer waveguide composed of linear isotropic dielectric materials. Alongside strict investigation into dispersion relations for multilayer systems, we give an explicit qualitative explanation for the phenomenon of mode matching on the basis of the standard one-dimensional homogenization technique, and discuss the minimum number of layers and the refractive index profile for the proposed device scheme. Direct applications of the scheme include polarization-insensitive, intermodal dispersion-free planar propagation, efficient fibre-to-planar waveguide coupling and, potentially, mode filtering. As a self-sufficient result, we present compact analytical expressions for the mode dispersion in a finite, N-period, three-layer dielectric superlattice.

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