Prelude to Integrated Photonics Simulation: Mode Injection

In this lecture, we show how to perfectly inject a specific mode into a straight waveguide. This is helpful in decreasing computational cost, and having a clean simulation without unwanted electromagnetic interference in the computational domain.

- Describe how to use the eigenmode solver to solve for guided modes.
- Describe how to setup mode sources to selectively excite the target mode along a specific propagating direction.
- As a comparison, we also illustrate the field profile when excited by a dipole source.

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