Air hole crystal lattice composite core broadband terahertz photonic crystal fiber

The invention discloses an air hole crystal lattice composite core broadband terahertz photonic crystal fiber. The air hole crystal lattice composite core broadband terahertz photonic crystal fiber comprises a body, a background material, fiber cores and a coating. The background material, the fiber cores and the coating are distributed on the body, the fiber cores are located in the middle of the body and evenly distributed on the background material, the body is of a Kagome crystal lattice structure formed by air holes, the coating is of a Kagome crystal lattice structure formed by air holes, and the refraction rate of the fiber cores is lower than that of the coating. By the adoption of the terahertz photonic crystal fiber with the Kagome air hole crystal lattice composite core broadband transmission function, the problems existing in the transmission bandwidth of a terahertz waveguide can be solved, and the fiber can be widely applied to the aspects such as terahertz spectroscopy, terahertz imaging and terahertz coherent chromatography.