Patent ID: 7906791

Claim:
A semiconductor light-emitting element in which an n-type GaN layer, an emission layer, and a p-type GaN layer are laminated on a substrate, wherein: an Mg x Zn 1−x O layer (0≦x≦0.5) is provided on the p-type GaN layer; concave or convex portions are formed on a surface of the Mg x Zn 1−x O layer (0≦x≦0.5) at two-dimensional periodic intervals; and if a wavelength of light from the emission layer in the air is λ, an index of refraction of the Mg x Zn 1−x O layer (0≦x≦0.5) at the wavelength λ is n zλ , and a total reflection angle at an interface between the Mg x Zn 1−x O layer (0≦x≦0.5) and a medium in contact therewith is periodic interval L z between adjacent concave portions or that between adjacent convex portions is in a range of λ n z ⁢ ⁢ λ ≦ L z ≦ λ n z ⁢ ⁢ λ ⁡ ( 1 - sin ⁢ ⁢ θ z ) .