Laser comprising a distributed bragg mirror and production method

A method for forming a laser comprising a distributed Bragg mirror, comprising:

• providing a stack of layers made of III-V materials comprising at least one active region configured to emit light radiation;
• forming a waveguide pattern in the stack of layers, the waveguide pattern having a length L along a longitudinal direction x, a height h along a first transverse direction z, and a width w along a second transverse direction y, the first and the second transverse directions being normal to the longitudinal direction x;
• depositing a first deposition of a first metal layer on a top of the waveguide pattern;
• and
• structuring the first metal layer so as to form a top electrode having lateral flanks that extend parallel to a lateral plane xz defined by the longitudinal direction x and the first transverse direction z,
• the structuring being configured to form lateral corrugations at the lateral flanks of the top electrode, the lateral corrugations being periodic with period Λ along the longitudinal direction x and having a dimension d along the second transverse direction y, such that the top electrode at least partly forms the distributed Bragg mirror, and the waveguide pattern does not have lateral corrugations.