STRONG PHOTON LOCALIZATION IN MESOSCOPIC SCALED OPTICAL WAVE-GUIDE

Strong photon localization in mesoscopic-scaled optical waveguide stru ctures has been analyzed through two numerical approaches. The convent ional electromagnetic wave analysis and the forced vibrational analysi s methods are applied to 2-dimensional mesoscopic-scaled optical waveg uide structures. The results indicate that both analysis methods give similar results for the density of states, the photonic band gap and t he strong photon localized states according to the introduction of ape riodic structures of the refractive indices in the waveguides. The cal culated mode patterns of the midgap states in the photonic band gap in dicate that the features of strongly localized states depend on the ap eriodicity, and light is localized strongly within a region of several micrometers in the random aperiodic waveguide. We also discuss fabric ation techniques for realistic quasi-random aperiodic structures and t he smearing out effect by the cladding layer which prevents the strong localization of light.