Patent ID: 7538357

Claim:
A semiconductor light emitting device comprising: a cavity including a mesa formed over a substrate, the mesa having an active layer and being isolated by a recess farmed around the mesa; a resin layer with which the recess is filled; and a metal film formed over a light output surface of the cavity and having an opening formed therein, wherein light emitted from the active layer is output through the light output surface, and the opening has a diameter smaller than an emission wavelength of the emitted light, two or more said openings are formed and arranged in a lattice, and relation in P =λ×(i 2 +j 2 ) 0.5 /(∈ 1 ∈ 2 /(∈ 1 +∈ 2 )) 0.5 is satisfied where P is an opening period of the openings, ∈ 1 is a dielectric constant of the metal film, ∈ 2 is a dielectric constant of a material of a layer that is in contact with the metal film, and i and j are integers that are not negative.