Patent ID: 11936163
Assignee: CHANGCHUN INSTITUTE OF OPTICS, FINE MECHANICS AND PHYSICS
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 15:
16. Method of fabricating a radiation emitter comprising the steps of
fabricating a layer stack that comprises a first reflector, at least one intermediate layer, an active region, and a second reflector;
locally oxidizing the at least one intermediate layer and thereby forming at least one unoxidized aperture in the at least one intermediate layer; and
locally removing the layer stack, and thereby forming a mesa, wherein the mesa comprises the first reflector, the at least one unoxidized aperture, the active region, and the second reflector;
wherein before or after locally removing the layer stack and forming the mesa the following steps are carried out:
forming at least a first unoxidized aperture and at least a second unoxidized aperture inside the intermediate layer;
etching a continuous trench inside the layer stack, said trench separating and defining at least a first portion of the mesa and at least a second portion of the mesa, wherein the trench severs the at least one intermediate layer and separates the first and second unoxidized apertures such that the first unoxidized aperture is located in the first portion of the mesa and the second unoxidized aperture is located in the second portion of the mesa, wherein the continuous trench also separates the active region;
wherein the first portion of the mesa is provided with a first optical damping tuning layer that is fabricated on top of the layer stack;
wherein the second portion of the mesa is provided with a second optical damping tuning layer that is fabricated on top of the layer stack; and
wherein the characteristics of the first optical damping layer differs from the characteristics of the second optical damping layer; and
fabricating an individual electrical contact for each of the portions.