Patent ID: 8891577

Claim:
An electrically pumped hybrid III-V group and silicon laser system, comprising: a silicon micro-ring resonator; a quantum well formed of a III-V group semiconductor material that is optically coupled with the silicon micro-ring resonator to provide optical gain; a first buffer formed of a III-V group semiconductor material doped with a first type of carrier, wherein the first buffer is optically coupled to the quantum well and the first buffer forms a ring with a cross section that is substantially triangular shaped or substantially trapezoidal shaped, wherein a trapezoidal shaped cross section comprises a quadrilateral with two parallel sides and two non-parallel sides; a ring electrode coupled to the first buffer, wherein the first buffer enables the ring electrode to be substantially isolated from an optical mode of the micro-ring resonator, wherein the ring electrode contacts the first buffer continuously around an edge of the ring formed by the first buffer; a second buffer formed of III-V group semiconductor material doped with a second type of carrier having a charge opposite the first type of carrier, the second buffer being located between the quantum well and the silicon micro-ring resonator; and a center electrode that contacts the second buffer to allow carriers to be injected into the quantum well by applying a bias potential between the center electrode and the ring electrode; wherein an imaginary cylinder has a center positioned at the center of the silicon micro-ring resonator and the imaginary cylinder has a radius defined by an innermost edge of the silicon micro-ring resonator, wherein the center electrode is confined within the imaginary cylinder.