title: Physical origin of the high energy optical response of three dimensional photonic crystals.
abstract: The physical origin of the optical response observed in three-dimensional photonic crystals when the photon wavelength is equal or lower than the lattice parameter still remains unsatisfactorily explained and is the subject of an intense and interesting debate. Herein we demonstrate for the first time that all optical spectra features in this high energy region of photonic crystals arise from electromagnetic resonances within the ordered array, modified by the interplay between these resonances with the opening of diffraction channels, the presence of imperfections and finite size effects. All these four phenomena are taken into account in our theoretical approach to the problem, which allows us to provide a full description of the observed optical response based on fundamental phenomena as well as to attain fair fittings of experimental results.
authors: Grupo de Electromagnetismo Aplicado, Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 1, 1428 Buenos Aires, Argentina.
authors: Luis A
authors: LA
authors: Dorado
authors: Ricardo A
authors: RA
authors: Depine
authors: Gabriel
authors: G
authors: Lozano
authors: Hernán
authors: H
authors: Míguez
mesh_terms: D003198:Computer Simulation; D003460:Crystallization; D004735:Energy Transfer; D008027:Light; D008420:Manufactured Materials; D008962:Models, Theoretical; D012542:Scattering, Radiation