Patent ID: 8648990

Claim:
An optical device including a laminate section in which a first conduction-type layer and a second conduction-type layer are laminated such that they sandwich an active layer, said optical device comprising: a reflection layer that is located on a first surface on said second conduction-type layer side of said laminate section and that reflects light that is emitted from said active layer or light that enters from a second surface opposite to said first surface of said laminate section and passes, through said active layer, toward said laminate section, wherein said reflection layer includes: a metal layer; and a transparent electrode layer located between said metal layer and said first surface of said laminate section, wherein said transparent electrode layer includes first and second transparent conduction films that is transparent to a wave length of light that enters from said active layer and that have conductivity, wherein said first and second transparent conduction films are laminated in this order on said first surface of said laminate section, wherein the refractive index of said second transparent conduction film is lower than that of each of said first transparent conduction film and said second conduction-type layer, and wherein the absorption coefficient of said second transparent conduction film is smaller than that of said first transparent conduction film.