Patent ID: 8445925

Claim:
A semiconductor optical device comprising: a group III nitride semiconductor substrate including a primary surface, the primary surface having a first orientation; a first group III nitride semiconductor laminate including a first active layer and formed on a first region of the primary surface; a group III nitride semiconductor thin film including a surface, the surface thereof having a second orientation different from the first orientation, the group III nitride semiconductor thin film being joined to a second region of the primary surface using a junction layer therebetween, the second region being different from the first region of the primary surface; and a second group III nitride semiconductor laminate including a second active layer and formed on the surface of the group III nitride semiconductor thin film, the first active layer including a first well layer, the first well layer containing indium, the second active layer including a second well layer, and the second well layer containing indium, and an emission wavelength of the first well layer being different from that of the second well layer.