Patent ID: 7613217

Claim:
A surface emitting semiconductor device comprising: a first conductivity type semiconductor region, provided on a GaAs semiconductor region, including a primary surface having a first area and a second area; a semiconductor mesa including an active layer and a second conductivity type semiconductor layer, said active layer being provided on said first area of said first conductivity type semiconductor region, said second conductivity type semiconductor layer being provided on said active layer, and said semiconductor mesa having a side surface; a current block semiconductor region, provided on said second area of said first conductivity type semiconductor region and said side surface of said semiconductor mesa, for confining carriers to said semiconductor mesa; a first DBR portion having a plurality of first DBR semiconductor layers and a plurality of second DBR semiconductor layers, said first DBR semiconductor layers and said second DBR semiconductor layers being arranged alternately; and a second DBR portion having a plurality of third DBR semiconductor layers and a plurality of fourth DBR semiconductor layers, said third DBR semiconductor layers and said fourth DBR semiconductor layers being arranged alternately; wherein said first conductivity type semiconductor region, said active layer and said second conductivity type semiconductor layer are provided between said first DBR portion and said second DBR portion; wherein said active layer is made of III-V compound semiconductor including at least nitrogen (N) as a V group member; wherein said surface emitting semiconductor device further comprises an additional semiconductor layer made of III-V compound semiconductor; wherein said additional semiconductor layer is provided between said first conductivity type semiconductor region and said active layer; and wherein a photoluminescence wavelength of said III-V compound semiconductor of said additional semiconductor layer is between that of said active layer and that of said first conductivity type semiconductor region.