Patent ID: 8340147
Filing Date: 2012-12-25
Classification: H01S

Abstract:
1. A laser diode comprising: an n-type semiconductor region; a p-type semiconductor region; a semiconductor mesa provided between the n-type semiconductor region and the p-type semiconductor region, the semiconductor mesa including an active layer; and a semiconductor burying region located between the n-type semiconductor region and the p-type semiconductor region, the semiconductor burying region being provided on a side face of the semiconductor mesa, wherein the semiconductor burying region includes a p-type semiconductor burying layer provided on the n-type semiconductor region and an n-type semiconductor burying layer provided on the p-type semiconductor burying layer, and the p-type semiconductor burying layer is doped with both of a p-type dopant and an electron-trapping element that forms a deep acceptor level in a band gap of the p-type semiconductor burying layer and traps electrons in the p-type semiconductor burying layer.