Surface-emitting semiconducting laser with structured waveguide has structured layer about lateral area of elevation with thickness selected so its optical thickness is at least equal to that of current carrying layer near elevation depth

摘要

The laser has an active zone with a pn junction enclosed by a first n-doped semiconducting layer and at least one p-doped semiconducting layer, a tunnel contact layer on the p-side of the active zone with an aperture with an aperture diameter and depth and covered by an n-doped current carrying layer (7) with an elevation in the aperture region. A structured layer (8) about the lateral area of the elevation has a thickness selected so its optical thickness is at least equal to that of the current carrying layer near the elevation depth.