Patent ID: 9531160
Filing Date: 2016-12-27
CPC Classification: H01S

Claim Text:
1. A two-dimensional photonic crystal surface emitting laser comprising a laminated structure including: an active layer for generating light having a wavelength λ a two-dimensional photonic crystal layer in which refractive index distribution is formed by modified refractive index regions two-dimensionally arranged in a plate-shaped base member, where a refractive index of the modified refractive index regions differs from that of the base member, the two-dimensional photonic crystal surface emitting laser emitting a laser beam in a direction of an inclination angle θ from a normal to the two-dimensional photonic crystal layer, wherein the modified refractive index regions in the two-dimensional photonic crystal layer are modulated at respective lattice points of a basic two-dimensional lattice whose periodicity is determined such that a resonant state of the light having the wavelength λ a modulation phase Ψ at each lattice point is expressed as Ψ=r↑·G′↑ by using a position vector r↑ of each lattice point and a reciprocal lattice vector G′↑=(g′