2008 Dmitry N. Chigrin, "Spatial distribution of the emission intensity in a photonic crystal: Self-interference of Bloch eigenwaves" arXiv
Such an enhancement is the result of the bunching of many Bloch eigenwaves with different wave vectors in the same direction due to the crystal anisotropy.
2010 Vladimir R. Tuz et al, "Polarization transformations by a magneto-photonic crystal in vicinity of ferromagnetic resonance" arXiv
On this basis the boundaries of the stopbands and passbands of the eigenwaves are determined.
