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1 SYMMETRIC PLANAR DIELECTRIC SLAB WAVEGUIDE B 2.1 SYMMETRIC PLANAR DIELECTRIC SLAB WAVEGUIDE B. Single and Multimode Waveguide. 8 Feb 2015 A planar dielectric waveguide has a central rectangular region of higher the dielectric slab waveguide: a single mode planar waveguide. 2 Propagation in waveguides, general relations . . Transition to a TE mode in a rectangular waveguide . 4 TE modes in a dielectric slab waveguide . 5.3 Propagation through dielectric waveguide structures . .. constant in the multi layer slab waveguide, we can rewrite equations 5.17 as d2ey,i(x) dx2. + k2. 1 shows the configuration of a typical planar dielectric waveguide. A light ray can be guided inside the slab by total internal reflection in the zigzag fashion. 6.2 GUIDED WAVES IN A SLAB DIELECTRIC WAVEGUIDE layers of dielectric: layer 1 (which has thickness h, and refractive index n1), and layers 2 and. electromagnetism > optical waveguides and cavities Consider an infinite plane slab of (non-magnetic) dielectric material, with index of refraction n and.Dielectric slab waveguides are the simplest optical waveguiding structures. In this chapter, the theory of planar dielectric waveguides will be explained. 6 Dec 2016 The basic geometry of a dielectric slab waveguide is shown in Fig. 1: The geometric configuration of a three-region slab dielectric waveguide. Dielectric Waveguide. Let us consider the simpler case of a rectangular slab of waveguide. Snell's Law of Reflection. Snell's Law of Refraction. Critical Angle:.