Picosecond terahertz pump–probe realized from Chinese terahertz free-electron laser

Wang Chao^{1, 2}, Xu Wen^{1, 3, †}, Mei Hong-Ying^{4, 1}, Qin Hua⁵, Zhao Xin-Nian^{1, 2}, Wen Hua^{1, 2}, Zhang Chao¹, Ding Lan³, Xu Yong⁶, Li Peng⁶, Wu Dai⁶, Li Ming⁶

Plots of transmission intensity versus delay time for different pumping frequencies as indicated. Smooth curves are the results given by Eq. (3) for 1.6 THz and 2.4 THz and coarse curves are the raw data of experimental results.