Near‐field optical probing of two‐dimensional photonic crystals: theory and experiment

We report new experimental results, and their theoretical analysis, on the mechanisms that control light transfer between two integrated waveguides connected by two‐dimensional matrices of dielectric pillars. The optical properties of the system are analysed from the well‐established formalism of classical field susceptibilities (Green dyadic functions). We apply this scheme to investigate the optical properties of two‐dimensional arrays connected to two integrated waveguides. Comparisons with current experimental work based on near‐field optical probing are provided together with a spectral analysis of the phenomenon.