LIGHT EMITTING ELEMENT AND ITS MANUFACTURE

摘要

PROBLEM TO BE SOLVED: To provide a light emitting element and its manufacturing method by which the light emitted by a light emitting part can be efficiently outputted to the outside.

SOLUTION: The light emitting element body A has the light emitting part 2 which is formed of an n-type GaN layer 2a and a p-type GaN layer 2b on one surface of a substrate 1 of sapphire and electrodes 3a and 3b which are respectively formed on the n-type GaN layer 2a and the p-type GaN layer 2b. The light emitting element body A has a refractive index adjusting part 4 which is composed of two types of media 4a and 4b of different refractive index and has a structure in which the refractive index regularly changes in a plane parallel to the light emitting part 2 on the other surface of the substrate 1. The refractive index adjusting part 4 is formed by reforming the other surface of the substrate 1 by radiating a convergent beam of pulse laser of a pulse width (1 ps or less) which does not cause heat damage to the periphery of the part to be irradiated with laser.

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