Abstract: An optoelectronic device comprises microwires or nanowires, each of which comprises an alternation of passivated portions and of active portions, the active portions being surrounded with an active layer, where the active layers do not extend on the passivated portions.

Abstract: An optoelectronic device comprises microwires or nanowires, each of which comprises an alternation of passivated portions and of active portions, the active portions being surrounded with an active layer, where the active layers do not extend on the passivated portions.

Abstract: It comprises a vaporization chamber containing the material to be vaporized and provided with at least one opening with a given cross-section for maintaining the material to be vaporized in the liquid state within said chamber and for emitting controlled flow molecular beams, a sleeve integral with the vaporization chamber surrounding the opening or openings having a given cross-section, heating means for maintaining the vaporization chamber isothermal and for obtaining an adequate temperature in the sleeve to prevent condensation of the vaporized material in said sleeve and in the opening or openings having a given cross-section.

Abstract: Evaporation cell for a liquid compound suitable for molecular jet epitaxy on a substrate from a compound which is liquid at ambient temperature and which comprises in per se known manner a cell containing said liquid compound in a main ultravacuum enclosure, the cell being provided with heating means. It comprises a preliminary vacuum enclosure tightly connected to the main enclosure and having a first opening provided with a valve and a pipe for forming and regulating the preliminary vacuum in the preliminary vacuum enclosure, an upwardly oriented second opening linked with a chamber containing a large free surface area reservoir for receiving a liquid compound stock, as well as a third downwardly oriented opening linked with a disassemblable reservoir for emptying the liquid compound, while in the preliminary vacuum enclosure is provided a three-way cock connecting the cell containing the liquid compound either to the large surface reservoir, or to the disassemblable reservoir.