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) The distributions of corresponding to the RTE state and the waveguide state of the SFGG. (b) The 2D distributions of the electric field intensities and (c) the reciprocal of for the two kinds of working states.