Transfer matrix method for optics of multilayer films

Contributions are welcome! Follow these steps:

1. Fork the repository
2. Create a branch: git checkout -b feature/new-feature
3. Commit your changes: git commit -am 'Add new feature'
4. Push to your branch: git push origin feature/new-feature
5. Open a Pull Request

• Follow the existing style (4-space indentation)
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• Update documentation when necessary

• Hansen, Wilford N. "Electric fields produced by the propagation of plane coherent electromagnetic radiation in a stratified medium." Journal of the Optical Society of America 58.3 (1968): 380-390.
• Born, Max, and Emil Wolf. Principles of optics: electromagnetic theory of propagation, interference and diffraction of light. Elsevier, 2013.
• https://github.com/sbyrnes321/tmm