Planar

A type of waveguide, that can be used e.g. to construct Stacks. Planar is an infinitely stratified medium, and is different from other waveguides (like Slab and Circ) in the sense that all modes (or propagation angles) are decoupled. Therefore, only one propagation angle is considered at a time.

Constructor:

• Planar(Material)

Member functions: same as Waveguide, in addition to

• set_theta(Complex): set propagation angle in radians in this layer. This automatically fixes the propagation angle in the other Planars because of Snell's Law. Note that you should set the wavelength before setting the angle, as set_theta effectively sets the transverse part of the wavevector, which is dependent on the wavelength.

See section Waveguide.

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