Photonic effect study on polystyrene 3D-photonic crystals at near-field range: dependence on the wavelength and on the lattice parameter

3D-photonic crystals (opals) based on polystyrene (PS) colloidal nanospheres are being characterized by scanning near-field optical microscopy (SNOM). These crystals offer a huge potential for controlling both the spontaneous emission of embedded light sources and the propagation of light itself.