Title :
Analysis of multilayer semiconductor rib waveguides with high refractive index substrates
Author :
Berry, G.M. ; Heaton, J.M. ; Wight, D.K.
Author_Institution :
Dept. of Phys. and Astron., Univ. of Wales Coll. of Cardiff, UK
Abstract :
The waveguiding properties of semiconductor rib waveguides with high refractive index substates are studied using the spectral index method. The propagation constants of leaky modes in such two-dimensional structures are calculated for the first time. The method is applied to the design of high wall GaAs-AlGaAs rib waveguides. Results indicate that the number of low-loss modes can be controlled by careful positioning of the substrate relative to the guiding region.
Keywords :
III-V semiconductors; aluminium compounds; gallium arsenide; optical waveguide theory; refractive index; GaAs-AlGaAs; high refractive index substrates; high wall rib waveguides; leaky modes; low-loss modes; multilayer semiconductor rib waveguides; propagation constants; spectral index method; two-dimensional structures; waveguiding properties;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19931292
