Patent ID: 7273565

Claim:
A method for manufacturing at least a first photonic device, comprising the steps: a) epitaxially growing a first set of layers, including at least a first waveguide layer, on a semiconductor material having a dopant of a first type; b) applying a first mask on top of the grown layers, removing the first set of layers in the unmasked areas, to form at least said first set of layers in a first waveguide mesa, and removing the first mask; c) epitaxially growing a cladding layer at least around said first waveguide mesa, said cladding layer having a dopant of a second type, opposite to said first type; d) epitaxially growing a contact layer on top of the cladding layer; e) and arranging a first metal contact ( 9 , 80 ) on top of the contact layer, above said first set of layers; f) etching the contact layer and the cladding layer, using a second mask covering the first waveguide mesa in the unmasked areas; and g) applying insulating material in the areas not covered with the second mask during etching in step f), the insulating material having a dielectric constant that is less than a dielectric constant of the cladding layer.