WIDE AREA ARRAY TYPE PHOTONIC CRYSTAL PHOTOMIXER FOR GENERATING AND DETECTING BROADBAND TERAHERTZ WAVE

摘要

The present invention relates to the core technique of a wide area array type photonic crystal photomixer which generates a continuous frequency change type and a pulse type broadband terahertz wave. The present invention improves optical absorption by using the transmission characteristic of a 2D photonic crystal structure, thereby increasing the generation efficiency of a terahertz wave. Moreover, the present invention secures a wide area array type photonic crystal photomixer by properly and spatially arranging a photonic crystal structure with various cycles and by applying an interdigit structure. Therefore, the present invention reduces the high optical density of the optical absorption to solve the difficulty of a thermal property and optical arrangement and greatly improves low photoelectric transformation efficiency. In addition, the radiation pattern of a terahertz wave can be electrically controlled by the present technique.