Patent ID: 7778300
Filing Date: 2010-08-17
Classification: H01S

Abstract:
1. A semiconductor device comprising: an optically pumped vertical emitter having an active vertical emitter layer, and a pump radiation source used to generate a pump radiation field which propagates in a lateral direction and optically pumps the vertical emitter layer in a pump region, a wavelength of the pump radiation field being smaller than a wavelength of a radiation field generated by the vertical emitter, wherein the pump radiation source has an active pump layer, which is arranged above or below the vertical emitter layer in a vertical direction and which at least partly overlaps the vertical emitter layer as seen in the vertical direction, the active pump layer being arranged in such a way that the pump radiation field generated during operation has a higher power than a parasitic laterally propagating radiation field generated by the vertical emitter layer or that generation of a parasitic laterally propagating radiation field by the vertical emitter layer is suppressed, wherein the pump radiation source is electrically excited by charge carrier injection for generation of the pump radiation, wherein charge carriers of a first charge carrier type and charge carriers of a second charge carrier type are injected into the semiconductor device, and wherein the charge carriers of the first charge carrier type have a higher net trapping rate than the charge carriers of the second charge carrier type and are injected into the semiconductor device from a side, the active pump layer being at a smaller distance from said side than from the vertical emitter layer.