Introduction Go to the next or main section.
This manual assumes that the reader is familiar with concepts from solid-state physics such as eigenstates, band structures, and Bloch's theorem. The eigensolver, Maxwell's equations, user interface, and so on, should be oblivious to each other as much as possible. Take advantage of inversion symmetry in the dielectric function, but don't require it. We feel that each has its own place in a researcher's toolbox, and each has unique advantages and disadvantages. Each field computed has a definite frequency.