WAVE-GUIDE STUDY AND REFRACTIVE-INDEXES OF GAN-MG EPITAXIAL FILM

Waveguide TE and TM modes in a GaN:Mg epitaxial crystalline film were studied in a wide spectral range (457.9-1053 nm). The refractive indic es n(e) and n(o) were accurately determined by TM and TE mode measurem ents at six different wavelengths (457.9, 514.5, 632.8, 724.3, 855.1, and 1053 nm). Dispersive curves of n(e) versus lambda and n(o) versus lambda were obtained. It was found that bireferingence slightly increa ses (n(e) - n(o) = 0.933-0.038) from 1053 to 457.9 nm. (C) 1996 Optica l Society of America