a laser oscillator is disclosed by means of current excitation by using a light - emitting element containing an organic matter . the present invention is a semiconductor device oscillating laser by current excitation comprising a light - emitting element having a laminated body which is formed by stacking sequentially a first layer made from an organic matter , a second layer containing an organic matter and a metal compound , and a third layer made from an organic matter interposed ; and a first electrode and a second electrode formed over a substrate , the electrodes interposing the laminated body therebetween ; wherein the organic matter contained in the second layer includes at least a light - emitting material .