Patent ID: 8284814

Claim:
A photonic crystal laser comprising: an active layer for generating light of a predetermined wave number range upon an injection of an electric current; a first photonic crystal layer for forming a standing wave of light within the first photonic crystal layer having a first wave number within the predetermined wave number range, among the light generated in the active layer; and a second photonic crystal layer for forming a standing wave of light within the second photonic crystal layer having a second wave number within the predetermined wave number range and different from the first wave number, among the light generated in the active layer, wherein the first photonic crystal layer is provided on one side of the active layer, and the second photonic crystal layer is provided on the other side of the active layer, and a spatial beat results from a superposition of the standing wave of light formed by the first photonic crystal layer and the standing wave of light formed by the second photonic crystal layer.