Planar waveguides based on epitaxial films of GaAsP and GaN for integrated optics applications

Abstract

It is shown how optimal Lévy flight searching patterns for the location of sparsely and randomly distributed targets can emerge from conspecific avoidance (i.e. behaviour designed to avoid locations previously traversed by individuals of the same species).

Optical Guided Modes and Surface Acoustic Waves in GaN Grown on (0001) Sapphire Substrates

“…The propagation of guided optical modes in GaN-on-sapphire structures was first reported in [1]. However, the quality of GaN layers used in these experiments was not sufficiently good, and the obtained values of the layer refractive indices seem to be too low as compared to later measurements.…”