Korringa-kohn-rostoker 3D photonic crystals 4 Band gaps 4 Constitutive parameters 4 Dispersion (waves) 4 Dispersion equations 4 Dispersion relations 4 Energy gap 4 Homogeneous media 4 Host mediums 4 Numerical code 4 Permittivity 4 Photonic crystals 4 Spectral position 4 Spheres 4 Three dimensional 4 Wave calculations 4 Composite materials 2 Effective media 2 Electromagnetic response 2 Inhomogeneous materials 2 Metallic matrix composites 2 Nanocomposite films 2 Nanoparticles 2 Optical properties 2 Optical resonance 2 Quantum optics 2 Recursive methods 2 Resonance 2 Specific optical properties 2