Patent ID: 8102890
Filing Date: 2012-01-24
Classification: H01S

Abstract:
1. A semiconductor light emitting device comprising: a first-conductivity-type first multilayer film reflecting mirror, and second-conductivity-type second multilayer film reflecting mirror; a cavity layer between the first multilayer film reflecting mirror and the second multilayer film reflecting mirror; and a first conductive section, a second conductive section, and a third conductive section used for current injection to the cavity layer, wherein the cavity layer has a stacked configuration including a first-conductivity-type or undoped first cladding layer, an undoped first active layer, a second-conductivity-type or undoped second cladding layer, a second-conductivity-type first contact layer, a first-conductivity-type second contact layer, a first-conductivity-type or undoped third cladding layer, an undoped second active layer, and a second-conductivity-type or undoped fourth cladding layer, in this order from the first multilayer film reflecting mirror side, the first conductive section is electrically connected to the first multilayer film reflecting mirror, the second conductive section is electrically connected to the second multilayer film reflecting mirror, and the third conductive section is electrically connected to the first contact layer and the second contact layer, wherein the cavity layer is formed by stacking a first stacked structure and a second stacked structure with each other with the third conductive section in between, the first stacked structure including, the first cladding layer, the first active layer, the second cladding layer, and the first contact layer in this order, and the second staked structure including the second contact layer, the third cladding layer, the second active layer, and the fourth cladding layer in this order, wherein the first active layer and the second active layer have band gaps different from each other, wherein the first active layer is arranged corresponding to a position of an antinode in a resonance mode generated in the cavity layer by light emitted from the first active layer, and to a position of a node in a resonance mode generated in the cavity layer by light emitted from the second active layer, and wherein the second active layer is arranged corresponding to a position of an antinode in the resonance mode generated in the cavity layer by the light emitted from the second active layer, and to a position of a node in the resonance mode generated in the cavity layer by the light emitted from the first active layer.