TWO-DIMENSIONAL PHOTONIC CRYSTAL SURFACE-EMITTING LASER LIGHT SOURCE

摘要

A surface-emitting laser light source for generating a linearly polarized laser beam having a single-peak beam profile where the intensity at and near the center is the highest. A two- dimensional photonic crystal where a vacancy (311 or 312) is made in a plate (31) and arranged in a tetragonal lattice is disposed on one side of an active layer (23). The planar shape (surface B) of the vacancies (311, 312) shown on the plan view on the emission side is smaller than the planar shape (surface C) on the active layer side. The position of the center of gravity of the planar shape of surface B is apart in the in- plane direction from that of the planer shape of surface C. With this, the symmetry in the plane of the two-dimensional photonic crystal is degraded, and a linearly-polarized single-peak laser beam can be generated. ® KIPO & WIPO 2007