Patent ID: 8619830
Filing Date: 2013-12-31
Classification: H01S

Abstract:
1. A photonic crystal surface emission laser, comprising: an active layer; and a photonic crystal layer made of a plate-shaped slab provided with modified refractive index areas having a refractive index different from that of the slab, the modified refractive index areas being arranged on each of lattice points of a first rhombic-like lattice and a second rhombic-like lattice in which two diagonals are respectively parallel and only one of the two diagonals has different lengths, wherein: a where a x1 and a y respectively represent a length of aforementioned one of the two diagonals having different lengths and that of an other one of the two diagonals of the first rhombic-like lattice, a x2 (a x2 ≠a x1 ) and a y respectively represent a length of the aforementioned one of the two diagonals having different lengths and that of an other one of the two diagonals of the second rhombic-like lattice, and n represents an equivalent refractive index of the photonic crystal layer in a direction perpendicular to the photonic crystal layer.