Patent ID: 6812152
Filing Date: 2004-11-02
Classification: H01S

Abstract:
A method for providing an improved surface of a III-V semiconductor at crystal mirror facets for laser cavities, comprising:providing a wafer comprising a layer of III-V semiconductor material; in an ambient atmosphere cleaving the wafer to produce an array with at least one laser emitter having at least one crystal mirror facet, wherein cleaving the wafer leaves reactive atoms at a site of cleavage; removing oxides and other surface contaminants formed with the reactive atoms from the at least one crystal mirror facet by controllably delivering nitrogen ions with an ion beam in a vacuum; during the step of removing oxides, forming first nitrides with the reactive atoms on the at least one crystal mirror facet; wherein the first nitrides comprise native nitride compounds, each native nitride compound including at least one group III element and nitrogen; and wherein a majoring of nitrogen in the native nitride compounds first nitrides is suplied by controllable delivering of nitrogen with a nitrogen ion beam, wherein the nitrogen ion beam is operated in an energy ion energy range from 1 to 1000 eV.