Patent ID: 8380033

Claim:
An apparatus comprising: a first semiconductor slab comprising a silicon material and including a first vertical boundary; a second semiconductor slab above the first semiconductor slab comprising a III-V material and including: a top and a bottom charge carrier layer; an active layer disposed between the charge carrier layers; electrical contacts coupled to the first or the second semiconductor slab, the active layer to receive charge carriers from the charge carrier layers in response to an electrical difference applied to the electrical contacts; and a ridge included in at least the top charge carrier layer; at least one overclad region coupled to the ridge of the second semiconductor slab; and an optical waveguide included in the first and second semiconductor slab and formed, at least in part, by the ridge, the first vertical boundary and the overclad region(s) to vertically confine an optical mode of the optical waveguide, the ridge to laterally confine the optical mode.