Patent ID: 9614352
Date: 2017-04-04
CPC Classifications: G02B,H01S

Claim:
1. A laser element including a photonic crystal layer on which laser light is incident, wherein the photonic crystal layer comprises: a base layer formed of a first refractive index medium; and a plurality of different refractive index regions formed of a second refractive index medium having a refractive index different from that of the first refractive index medium and disposed in the base layer, the plurality of different refractive index regions has a plane shape that is an approximate triangle, an approximate ellipse in which a flatness ratio is not zero, or a non-rotational symmetric shape, a unit configuration region is formed of one different refractive index region, in the unit configuration region, a rotation angle of one point on a contour of the plane shape with respect to a central position of the different refractive index region is denoted by φ, in an XY plane including an X axis and an Y axis, a plurality of the unit configuration regions is two-dimensionally arranged, XY coordinates of each of the unit configuration regions is given to a central position of the different refractive index region, when the XY coordinates of the unit configuration region are (X, Y),