Abstract: An electrooptic modulator includes structure defining a single crystal substrate upon which are positioned, in succession, an inside reflector formed by a set of epitaxial single crystal layers, a resonator layer and an outside reflector formed by another set of epitaxial single crystal layers. A first part of the structure, including one or more of the inside reflector, substrate and resonator layer, is electrically conductive (either p-type or n-type conduction) and a second part, including the outside reflector and/or the resonator layer, is electrically conductive (either n-type or p-type conduction, but a different to the first part).

Abstract: A current injection modulator includes structure defining a single crystal substrate, having some refractive index, on which are positioned, in succession, an inside reflector formed by a first set of epitaxial single crystal layers, a resonator layer and an outside reflector formed by a second set of epitaxial single crystal layers. At least a first part of the structure, including one or more of the inside reflector, substrate and resonator layer, is electrically conductive (either p-type or n-type conduction) and at least a second part of the structure, including the outside reflector and/or the resonator layer, is electrically conductive (either n-type or p-type conduction, but different from the first part).

Abstract: A current injection laser including a single crystal substrate of a given refractive index upon which is positioned successively, an inner reflection formed by a first set of epitaxial single crystal layers, a resonator layer and an outside reflector layer formed by a second set of epitaxial single crystal layers. At least one of the inner reflector, resonator and outer reflector being of p-type or n-type conductivity and at least one of the inner reflector, resonator and outer reflector being of opposite type conductivity.