Dynamic control of the terahertz rainbow trapping effect based on a silicon-filled graded grating

Wang Shu-Lin¹, Ding Lan^{1, †}, Xu Wen^{1, 2, ‡}

(color online) (a) Three kinds of distributions of along the x-direction, i.e., , 3.4, and , respectively. The 2D distributions of the electric field intensities for (b) , (c) , and (d) .