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) The dispersion relations of the SSPs supported by the SFGG for (a) , (b) , and (c) . Reciprocal of of the SSPs corresponding to (d) , (e) , and (f) are calculated according to the dispersion curves.