Development of Terahertz Radiation Source with Slit-Array Structure

We have proposed a slit-array configuration demonstrating higher efficiency in terahertz radiation. Based on the radiation mechanism, we planned to develop terahertz emitter and coherent radiation source. Research on the geometrical structure, the output methods, and the radiation characteristics are being performed, and the experimental setup is under construction. In this paper, we report on the radiation physics and the consideration on effectively outputting the terahertz radiation, and introduce the recent progress in experiments.