TWO-DIMENSIONAL TOPOLOGY PHOTONIC CRYSTAL CAVITY, DESIGN METHOD THEREOF AND APPLICATION IN LASER

摘要

A two-dimensional topology photonic crystal cavity, a design method thereof and an application in a laser. The two-dimensional topology photonic crystal cavity comprises multiple photonic crystal supercells, the multiple photonic crystal supercells having vortex-shaped structural variation around a center of the two-dimensional topology photonic crystal cavity, and bands of the multiple photonic crystal supercells having Dirac points at balanced positions of the vortex-shaped structural variation. The two-dimensional topology photonic crystal cavity, also called a Dirac vortex cavity, is characterized by having a large mode field area, a large free spectral range, a narrow light beam divergence angle, arbitrary mode degeneracy and compatibility with multiple types of substrate material, and may be used in a surface-emitting semiconductor laser, enabling stable single-transverse-mode and single-longitudinal-mode operation, while ensuring broad-area and high-energy output of a laser.