Patent ID: 7082247

Claim:
A waveguide coupling on a substrate, where the waveguide coupling is comprised of: a core comprised of: a slab of monocrystalline silicon, with a bidirectional port and a terminating end opposite the bidirectional port, where the slab of silicon and a silicon body of a transistor are formed from the same layer of monocrystalline silicon on the same substrate, and a slab of polysilicon disposed on top of a portion of the slab of monocrystalline silicon, with a bidirectional port and a terminating end opposite the bidirectional port, where the slab of polysilicon and a polysilicon gate for a transistor are formed at the same time from the same polysilicon, and a cladding comprised of a plurality of dielectric materials, where at least one of the plurality of dielectric materials is comprised of a salicide block layer used during the fabrication of a transistor on the same substrate.