Double-side processed III-V nanowire waveguide on a silicon substrate
We introduce a III-V nanowire waveguide structure on a silicon substrate through III-V to silicon adhesive bonding technology. The proposed waveguide structure provides an omni-directional high-refractive-index contrast which is similar to the conventional silicon-on-insulator nanowire waveguides. The optical confinement factor in the active region of the proposed structure nearly doubles that in the conventional hybrid III-V waveguides with a thick p-InP top cladding layer. Electrical injection is also favored in the proposed structure using two thin lateral contact layers which can be fabricated through a double side patterning process. Passive waveguides are fabricated and measured. Propagation losses of 16.18 and 17.83dB/mm are extracted for the fundamental transverse-electrical and transverse-magnetic modes, respectively, in the proposed III-V nanowire waveguide of 600nm width.
nanowire waveguide electrical injection hybrid integration double side processing