
Periodic dielectric waveguide in 2D, a series of dielectric squares,
2D simulations of configurations with the following specification: background refractive index 1.0, permittivity of the dielectric squares 12, square edges 0.4 µm, period Λ = 1 µm. The parameter set has been adapted from J.D. Joannopoulos et al., "Photonic Crystals  Molding the Flow of Light", Princeton University Press, 2008. All calculations are meant for TE polarization, i.e. E_{y} is the single nonvanishing component of the electrical field. The BEP simulations are based on a piecewise spectral discretization with wavelength adapted computational window and wavelength adapted number of modal expansion terms. Band structure diagram: Normalized angular frequency ω (= period / vacuum wavelength) versus the normalized wavenumber β of guided FloquetBloch modes. The links at the positions indicated by the tick marks lead to illustrations of the time dependent electric fields associated with the propagation of the FloquetBloch modes. 