Patent ID: 7769067

Claim:
A surface emitting laser device comprising: a first reflective mirror; a second reflective mirror having a periodic-refractive-index structure in which the refractive index periodically changes in the in-plane direction of a plane opposing the first reflective mirror; and an active layer disposed between the first reflective mirror and the second reflective mirror, wherein the periodic-refractive-index structure includes a plurality of parts that disorder the periodicity of the periodic-refractive-index structure of the second reflective mirror, and wherein the periodic-refractive-index structure is structured such that light incident on the periodic-refractive-index structure in the perpendicular direction to the in-plan direction of the periodic-refractive-index structure causes resonance in the in-plane direction and the light is emitted in the direction perpendicular to the in-plane direction, wherein the second reflective mirror comprises a plurality of layers each having a periodic-refractive-index structure.